diff --git a/internal/controller/command.go b/internal/controller/command.go
index 7003ef5..287a381 100644
--- a/internal/controller/command.go
+++ b/internal/controller/command.go
@@ -78,7 +78,7 @@ func (c *Controller) ShipClassRemove(actor, typeName string) error {
 	return c.Cache.shipClassRemove(ri, typeName)
 }
 
-func (c *Controller) ShipGroupLoad(actor string, groupID uuid.UUID, cargoType string, ships uint, quantity float64) error {
+func (c *Controller) ShipGroupLoad(actor string, groupID uuid.UUID, cargoType string, quantity float64) error {
 	ri, err := c.Cache.validActor(actor)
 	if err != nil {
 		return err
@@ -87,31 +87,31 @@ func (c *Controller) ShipGroupLoad(actor string, groupID uuid.UUID, cargoType st
 	if !ok {
 		return e.NewCargoTypeInvalidError(cargoType)
 	}
-	return c.Cache.shipGroupLoad(ri, groupID, ct, ships, quantity)
+	return c.Cache.shipGroupLoad(ri, groupID, ct, quantity)
 }
 
-func (c *Controller) ShipGroupUnload(actor string, groupID uuid.UUID, ships uint, quantity float64) error {
+func (c *Controller) ShipGroupUnload(actor string, groupID uuid.UUID, quantity float64) error {
 	ri, err := c.Cache.validActor(actor)
 	if err != nil {
 		return err
 	}
-	return c.Cache.shipGroupUnload(ri, groupID, ships, quantity)
+	return c.Cache.shipGroupUnload(ri, groupID, quantity)
 }
 
-func (c *Controller) ShipGroupSend(actor string, groupID uuid.UUID, planetNumber, quantity uint) error {
+func (c *Controller) ShipGroupSend(actor string, groupID uuid.UUID, planetNumber uint) error {
 	ri, err := c.Cache.validActor(actor)
 	if err != nil {
 		return err
 	}
-	return c.Cache.shipGroupSend(ri, groupID, planetNumber, quantity)
+	return c.Cache.shipGroupSend(ri, groupID, planetNumber)
 }
 
-func (c *Controller) ShipGroupUpgrade(actor string, groupID uuid.UUID, techInput string, limitShips uint, limitLevel float64) error {
+func (c *Controller) ShipGroupUpgrade(actor string, groupID uuid.UUID, techInput string, limitLevel float64) error {
 	ri, err := c.Cache.validActor(actor)
 	if err != nil {
 		return err
 	}
-	return c.Cache.shipGroupUpgrade(ri, groupID, techInput, limitShips, limitLevel)
+	return c.Cache.shipGroupUpgrade(ri, groupID, techInput, limitLevel)
 }
 
 func (c *Controller) ShipGroupMerge(actor string) error {
@@ -123,23 +123,23 @@ func (c *Controller) ShipGroupMerge(actor string) error {
 	return nil
 }
 
-func (c *Controller) ShipGroupBreak(actor string, groupID uuid.UUID, quantity uint) error {
+func (c *Controller) ShipGroupBreak(actor string, groupID, newID uuid.UUID, quantity uint) error {
 	ri, err := c.Cache.validActor(actor)
 	if err != nil {
 		return err
 	}
-	return c.Cache.ShipGroupBreak(ri, groupID, quantity)
+	return c.Cache.ShipGroupBreak(ri, groupID, newID, quantity)
 }
 
-func (c *Controller) ShipGroupDismantle(actor string, groupID uuid.UUID, quantity uint) error {
+func (c *Controller) ShipGroupDismantle(actor string, groupID uuid.UUID) error {
 	ri, err := c.Cache.validActor(actor)
 	if err != nil {
 		return err
 	}
-	return c.Cache.shipGroupDismantle(ri, groupID, quantity)
+	return c.Cache.shipGroupDismantle(ri, groupID)
 }
 
-func (c *Controller) ShipGroupTransfer(actor, acceptor string, groupID uuid.UUID, quantity uint) error {
+func (c *Controller) ShipGroupTransfer(actor, acceptor string, groupID uuid.UUID) error {
 	ri, err := c.Cache.validActor(actor)
 	if err != nil {
 		return err
@@ -148,15 +148,15 @@ func (c *Controller) ShipGroupTransfer(actor, acceptor string, groupID uuid.UUID
 	if err != nil {
 		return err
 	}
-	return c.Cache.shipGroupTransfer(ri, riAccept, groupID, quantity)
+	return c.Cache.shipGroupTransfer(ri, riAccept, groupID)
 }
 
-func (c *Controller) ShipGroupJoinFleet(actor, fleetName string, groupID uuid.UUID, quantity uint) error {
+func (c *Controller) ShipGroupJoinFleet(actor, fleetName string, groupID uuid.UUID) error {
 	ri, err := c.Cache.validActor(actor)
 	if err != nil {
 		return err
 	}
-	return c.Cache.ShipGroupJoinFleet(ri, fleetName, groupID, quantity)
+	return c.Cache.ShipGroupJoinFleet(ri, fleetName, groupID)
 }
 
 func (c *Controller) FleetMerge(actor, fleetSourceName, fleetTargetName string) error {
diff --git a/internal/controller/controller.go b/internal/controller/controller.go
index e8d0f7a..70f1a21 100644
--- a/internal/controller/controller.go
+++ b/internal/controller/controller.go
@@ -51,15 +51,15 @@ type Ctrl interface {
 	ShipClassCreate(actor, typeName string, drive float64, ammo int, weapons, shileds, cargo float64) error
 	ShipClassMerge(actor, name, targetName string) error
 	ShipClassRemove(actor, typeName string) error
-	ShipGroupLoad(actor string, groupID uuid.UUID, cargoType string, ships uint, quantity float64) error
-	ShipGroupUnload(actor string, groupID uuid.UUID, ships uint, quantity float64) error
-	ShipGroupSend(actor string, groupID uuid.UUID, planetNumber, quantity uint) error
-	ShipGroupUpgrade(actor string, groupID uuid.UUID, techInput string, limitShips uint, limitLevel float64) error
-	ShipGroupBreak(actor string, groupID uuid.UUID, quantity uint) error
+	ShipGroupLoad(actor string, groupID uuid.UUID, cargoType string, quantity float64) error
+	ShipGroupUnload(actor string, groupID uuid.UUID, quantity float64) error
+	ShipGroupSend(actor string, groupID uuid.UUID, planetNumber uint) error
+	ShipGroupUpgrade(actor string, groupID uuid.UUID, techInput string, limitLevel float64) error
+	ShipGroupBreak(actor string, groupID, newID uuid.UUID, quantity uint) error
 	ShipGroupMerge(actor string) error
-	ShipGroupDismantle(actor string, groupID uuid.UUID, quantity uint) error
-	ShipGroupTransfer(actor, acceptor string, groupID uuid.UUID, quantity uint) error
-	ShipGroupJoinFleet(actor, fleetName string, groupID uuid.UUID, count uint) error
+	ShipGroupDismantle(actor string, groupID uuid.UUID) error
+	ShipGroupTransfer(actor, acceptor string, groupID uuid.UUID) error
+	ShipGroupJoinFleet(actor, fleetName string, groupID uuid.UUID) error
 	FleetMerge(actor, fleetSourceName, fleetTargetName string) error
 	FleetSend(actor, fleetName string, planetNumber uint) error
 	ScienceCreate(actor, typeName string, drive, weapons, shields, cargo float64) error
diff --git a/internal/controller/fleet.go b/internal/controller/fleet.go
index 9a5defa..f4b571b 100644
--- a/internal/controller/fleet.go
+++ b/internal/controller/fleet.go
@@ -101,7 +101,7 @@ func (c *Cache) FleetSpeedAndMass(fi int) (float64, float64) {
 	return speed, mass
 }
 
-func (c *Cache) ShipGroupJoinFleet(ri int, fleetName string, groupID uuid.UUID, quantity uint) (err error) {
+func (c *Cache) ShipGroupJoinFleet(ri int, fleetName string, groupID uuid.UUID) (err error) {
 	c.validateRaceIndex(ri)
 	name, ok := util.ValidateTypeName(fleetName)
 	if !ok {
@@ -116,10 +116,6 @@ func (c *Cache) ShipGroupJoinFleet(ri int, fleetName string, groupID uuid.UUID,
 		return e.NewShipsBusyError("state: %s", state)
 	}
 
-	if c.ShipGroup(sgi).Number < quantity {
-		return e.NewJoinFleetGroupNumberNotEnoughError("%d<%d", c.ShipGroup(sgi).Number, quantity)
-	}
-
 	var oldFleetID *uuid.UUID
 	if c.ShipGroup(sgi).FleetID != nil {
 		fID := *c.ShipGroup(sgi).FleetID
@@ -139,14 +135,6 @@ func (c *Cache) ShipGroupJoinFleet(ri int, fleetName string, groupID uuid.UUID,
 		}
 	}
 
-	if quantity > 0 && quantity < c.ShipGroup(sgi).Number {
-		nsgi, err := c.breakGroup(ri, groupID, quantity)
-		if err != nil {
-			return err
-		}
-		sgi = nsgi
-	}
-
 	c.internalShipGroupJoinFleet(sgi, &c.g.Fleets[fi].ID)
 
 	if oldFleetID != nil {
diff --git a/internal/controller/fleet_send_test.go b/internal/controller/fleet_send_test.go
index 409127b..6bfaa67 100644
--- a/internal/controller/fleet_send_test.go
+++ b/internal/controller/fleet_send_test.go
@@ -29,22 +29,22 @@ func TestFleetSend(t *testing.T) {
 	fleetUnmovable := "R0_Fleet_unmovable"
 	fleetUnmovable2 := "R0_Fleet_unmovable2"
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetSending, c.ShipGroup(0).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetSending, c.ShipGroup(0).ID))
 	assert.Len(t, slices.Collect(c.ListFleets(Race_0_idx)), 1)
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetSending, c.ShipGroup(2).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetSending, c.ShipGroup(2).ID))
 	assert.Len(t, slices.Collect(c.ListFleets(Race_0_idx)), 1)
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetInSpace, c.ShipGroup(1).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetInSpace, c.ShipGroup(1).ID))
 	assert.Len(t, slices.Collect(c.ListFleets(Race_0_idx)), 2)
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetUnmovable, c.ShipGroup(2).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetUnmovable, c.ShipGroup(2).ID))
 	assert.Len(t, slices.Collect(c.ListFleets(Race_0_idx)), 3)
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetUnmovable2, c.ShipGroup(3).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetUnmovable2, c.ShipGroup(3).ID))
 	assert.Len(t, slices.Collect(c.ListFleets(Race_0_idx)), 4)
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetUnmovable, c.ShipGroup(3).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetUnmovable, c.ShipGroup(3).ID))
 	assert.Len(t, slices.Collect(c.ListFleets(Race_0_idx)), 3)
 
 	// group #2 - in_space
diff --git a/internal/controller/fleet_test.go b/internal/controller/fleet_test.go
index f3643dd..9a33723 100644
--- a/internal/controller/fleet_test.go
+++ b/internal/controller/fleet_test.go
@@ -19,11 +19,11 @@ func TestShipGroupJoinFleet(t *testing.T) {
 	fleetTwo := "R0_Fleet_two"
 
 	assert.ErrorContains(t,
-		g.ShipGroupJoinFleet(Race_0.Name, BadEntityName, groupIndex, 0),
+		g.ShipGroupJoinFleet(Race_0.Name, BadEntityName, groupIndex),
 		e.GenericErrorText(e.ErrInputEntityTypeNameInvalid))
 
 	assert.ErrorContains(t,
-		g.ShipGroupJoinFleet(Race_0.Name, "Unnamed", groupIndex, 0),
+		g.ShipGroupJoinFleet(Race_0.Name, "Unnamed", groupIndex),
 		e.GenericErrorText(e.ErrInputEntityNotExists))
 
 	// creating ShipGroup
@@ -31,20 +31,16 @@ func TestShipGroupJoinFleet(t *testing.T) {
 	groupIndex = c.ShipGroup(0).ID
 
 	assert.ErrorContains(t,
-		g.ShipGroupJoinFleet(UnknownRace, fleetOne, groupIndex, 0),
+		g.ShipGroupJoinFleet(UnknownRace, fleetOne, groupIndex),
 		e.GenericErrorText(e.ErrInputUnknownRace))
 	assert.ErrorContains(t,
-		g.ShipGroupJoinFleet(Race_Extinct.Name, fleetOne, groupIndex, 0),
+		g.ShipGroupJoinFleet(Race_Extinct.Name, fleetOne, groupIndex),
 		e.GenericErrorText(e.ErrRaceExinct))
 
-	assert.ErrorContains(t,
-		g.ShipGroupJoinFleet(Race_0.Name, "Unnamed", groupIndex, 6),
-		e.GenericErrorText(e.ErrJoinFleetGroupNumberNotEnough))
-
 	// ensure race has no Fleets
 	assert.Len(t, slices.Collect(c.ListFleets(Race_0_idx)), 0)
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetOne, groupIndex, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetOne, groupIndex))
 	fleets := slices.Collect(c.ListFleets(Race_0_idx))
 	groups := slices.Collect(c.RaceShipGroups(Race_0_idx))
 	assert.Len(t, groups, 1)
@@ -60,29 +56,25 @@ func TestShipGroupJoinFleet(t *testing.T) {
 	// create another ShipGroup
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Gunship, R0_Planet_0_num, 3))
 	groupIndex = c.ShipGroup(1).ID
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetTwo, groupIndex, 2))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetTwo, groupIndex))
 	fleets = slices.Collect(c.ListFleets(Race_0_idx))
 	groups = slices.Collect(c.RaceShipGroups(Race_0_idx))
-	assert.Len(t, groups, 3)
+	assert.Len(t, groups, 2)
 	assert.Len(t, fleets, 2)
 	assert.Equal(t, fleets[1].Name, fleetTwo)
 	fleetState = c.FleetState(fleets[1].ID)
 	assert.Equal(t, game.StateInOrbit, fleetState.State)
 
-	gi = 2
-	assert.Len(t, groups, 3)
+	gi = 1
+	assert.Len(t, groups, 2)
 	assert.NotNil(t, groups[gi].FleetID)
 	assert.Equal(t, fleets[1].ID, *groups[gi].FleetID)
-	assert.Equal(t, uint(2), groups[gi].Number)
-
-	gi = 1
-	assert.Nil(t, groups[gi].FleetID)
-	assert.Equal(t, uint(1), groups[gi].Number)
+	assert.Equal(t, uint(3), groups[gi].Number)
 
 	groupIndex = groups[gi].ID
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetOne, groupIndex, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetOne, groupIndex))
 	fleets = slices.Collect(c.ListFleets(Race_0_idx))
-	assert.Len(t, fleets, 2)
+	assert.Len(t, fleets, 1)
 	groups = slices.Collect(c.RaceShipGroups(Race_0_idx))
 	assert.NotNil(t, groups[gi].FleetID)
 	assert.Equal(t, fleets[0].ID, *groups[gi].FleetID)
@@ -91,10 +83,10 @@ func TestShipGroupJoinFleet(t *testing.T) {
 
 	// group not In_Orbit
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Gunship, R0_Planet_0_num, 7))
-	gi = 3
+	gi = 2
 	c.ShipGroup(gi).StateInSpace = &InSpace
 	assert.ErrorContains(t,
-		g.ShipGroupJoinFleet(Race_0.Name, fleetOne, c.ShipGroup(gi).ID, 0),
+		g.ShipGroupJoinFleet(Race_0.Name, fleetOne, c.ShipGroup(gi).ID),
 		e.GenericErrorText(e.ErrShipsBusy))
 	c.ShipGroup(gi).StateInSpace = nil
 
@@ -102,7 +94,7 @@ func TestShipGroupJoinFleet(t *testing.T) {
 	c.ShipGroup(0).StateInSpace = &InSpace
 	c.ShipGroup(1).StateInSpace = c.ShipGroup(0).StateInSpace
 	assert.ErrorContains(t,
-		g.ShipGroupJoinFleet(Race_0.Name, fleetOne, c.ShipGroup(gi).ID, 0),
+		g.ShipGroupJoinFleet(Race_0.Name, fleetOne, c.ShipGroup(gi).ID),
 		e.GenericErrorText(e.ErrShipsNotOnSamePlanet))
 }
 
@@ -133,21 +125,21 @@ func TestFleetMerge(t *testing.T) {
 		e.GenericErrorText(e.ErrRaceExinct))
 
 	assert.ErrorContains(t,
-		g.ShipGroupJoinFleet(UnknownRace, fleetSourceOne, c.ShipGroup(0).ID, 0),
+		g.ShipGroupJoinFleet(UnknownRace, fleetSourceOne, c.ShipGroup(0).ID),
 		e.GenericErrorText(e.ErrInputUnknownRace))
 	assert.ErrorContains(t,
-		g.ShipGroupJoinFleet(Race_Extinct.Name, fleetSourceOne, c.ShipGroup(0).ID, 0),
+		g.ShipGroupJoinFleet(Race_Extinct.Name, fleetSourceOne, c.ShipGroup(0).ID),
 		e.GenericErrorText(e.ErrRaceExinct))
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetSourceOne, c.ShipGroup(0).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetSourceOne, c.ShipGroup(0).ID))
 
 	assert.ErrorContains(t,
 		g.FleetMerge(Race_0.Name, fleetSourceOne, fleetTargetTwo),
 		e.GenericErrorText(e.ErrInputEntityNotExists))
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetTargetTwo, c.ShipGroup(2).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetTargetTwo, c.ShipGroup(2).ID))
 	assert.NoError(t, g.FleetMerge(Race_0.Name, fleetSourceOne, fleetTargetTwo))
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetOnPlanet2, c.ShipGroup(1).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleetOnPlanet2, c.ShipGroup(1).ID))
 
 	assert.ErrorContains(t,
 		g.FleetMerge(Race_0.Name, fleetOnPlanet2, fleetTargetTwo),
@@ -168,12 +160,12 @@ func TestFleetSpeedAndMass(t *testing.T) {
 	m := c.ShipGroup(0).FullMass(c.MustShipClass(Race_0_idx, Race_0_Gunship))
 
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Freighter, R0_Planet_0_num, 5)) // 2
-	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(1).ID, "MAT", 10., 0))
+	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(1).ID, "MAT", 10.))
 
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Freighter, R0_Planet_0_num, 7)) // 3
-	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(2).ID, "CAP", 10., 0))
+	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(2).ID, "CAP", 10.))
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleet, c.ShipGroup(0).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleet, c.ShipGroup(0).ID))
 	fleetIndex := 0
 	speed, mass = c.FleetSpeedAndMass(fleetIndex)
 	assert.Equal(t, s, speed)
@@ -182,7 +174,7 @@ func TestFleetSpeedAndMass(t *testing.T) {
 	s = math.Min(s, c.ShipGroup(1).Speed(c.MustShipClass(Race_0_idx, Race_0_Freighter)))
 	m += c.ShipGroup(1).FullMass(c.MustShipClass(Race_0_idx, Race_0_Freighter))
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleet, c.ShipGroup(1).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleet, c.ShipGroup(1).ID))
 	speed, mass = c.FleetSpeedAndMass(fleetIndex)
 	assert.Equal(t, s, speed)
 	assert.Equal(t, m, mass)
@@ -190,7 +182,7 @@ func TestFleetSpeedAndMass(t *testing.T) {
 	s = math.Min(s, c.ShipGroup(2).Speed(c.MustShipClass(Race_0_idx, Race_0_Freighter)))
 	m += c.ShipGroup(2).FullMass(c.MustShipClass(Race_0_idx, Race_0_Freighter))
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleet, c.ShipGroup(2).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleet, c.ShipGroup(2).ID))
 	speed, mass = c.FleetSpeedAndMass(fleetIndex)
 	assert.Equal(t, s, speed)
 	assert.Equal(t, m, mass)
diff --git a/internal/controller/planet_test.go b/internal/controller/planet_test.go
index ceec7c9..26ea51b 100644
--- a/internal/controller/planet_test.go
+++ b/internal/controller/planet_test.go
@@ -191,8 +191,8 @@ func TestProduceShips(t *testing.T) {
 	c.MustPlanet(R0_Planet_2_num).Population = 100
 	c.MustPlanet(R0_Planet_2_num).Industry = 100
 	c.RaceTechLevel(Race_0_idx, game.TechDrive, 1.5)
-	assert.NoError(t, g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(1).ID, "Drive", 0, 0))
-	assert.NoError(t, g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "Drive", 0, 0))
+	assert.NoError(t, g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(1).ID, "Drive", 0))
+	assert.NoError(t, g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "Drive", 0))
 	assert.Equal(t, game.StateUpgrade, c.ShipGroup(0).State())
 	assert.Equal(t, game.StateUpgrade, c.ShipGroup(1).State())
 
diff --git a/internal/controller/route_test.go b/internal/controller/route_test.go
index 7a1ed68..431fe6b 100644
--- a/internal/controller/route_test.go
+++ b/internal/controller/route_test.go
@@ -118,11 +118,11 @@ func TestListRoutedSendGroupIds(t *testing.T) {
 
 	// Foreign group -> idx 1
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Freighter, R0_Planet_0_num, 10))
-	assert.NoError(t, g.ShipGroupTransfer(Race_0.Name, Race_1.Name, c.ShipGroup(4).ID, 0))
+	assert.NoError(t, g.ShipGroupTransfer(Race_0.Name, Race_1.Name, c.ShipGroup(4).ID))
 
 	// 5: idx = 4 / Part of the Fleet
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Freighter, R0_Planet_0_num, 10))
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "Fleet", c.ShipGroup(5).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "Fleet", c.ShipGroup(5).ID))
 
 	planet_0_groups := slices.Collect(c.ListRoutedSendGroupIds(0))
 	assert.Len(t, planet_0_groups, 1)
@@ -283,7 +283,7 @@ func TestListRoutedUnloadShipGroupIds(t *testing.T) {
 
 	// 5: idx = 4 / Part of the Fleet
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Freighter, R0_Planet_0_num, 10))
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "Fleet", c.ShipGroup(4).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "Fleet", c.ShipGroup(4).ID))
 
 	assert.NoError(t, g.PlanetRouteSet(Race_0.Name, "COL", R0_Planet_0_num, R0_Planet_2_num))
 	for _, rt := range game.RouteTypeSet {
diff --git a/internal/controller/ship_group.go b/internal/controller/ship_group.go
index 3761aee..da2ced6 100644
--- a/internal/controller/ship_group.go
+++ b/internal/controller/ship_group.go
@@ -96,6 +96,7 @@ func (c *Cache) TurnMergeEqualShipGroups() {
 }
 
 func (c *Cache) transferPendingGroups(ri int) {
+	c.validateRaceIndex(ri)
 	for sg := range c.listShipGroups(ri) {
 		if sg.State() == game.StateTransfer {
 			sg.StateTransfer = false
@@ -146,7 +147,8 @@ func (c *Cache) shipGroupMerge(ri int) {
 	}
 }
 
-func (c *Cache) shipGroupDismantle(ri int, groupIndex uuid.UUID, quantity uint) error {
+func (c *Cache) shipGroupDismantle(ri int, groupIndex uuid.UUID) error {
+	c.validateRaceIndex(ri)
 	sgi, ok := c.raceShipGroupIndex(ri, groupIndex)
 	if !ok {
 		return e.NewEntityNotExistsError("group #%d", groupIndex)
@@ -156,10 +158,6 @@ func (c *Cache) shipGroupDismantle(ri int, groupIndex uuid.UUID, quantity uint)
 		return e.NewShipsBusyError("state: %s", state)
 	}
 
-	if c.ShipGroup(sgi).Number < quantity {
-		return e.NewBeakGroupNumberNotEnoughError("%d<%d", c.ShipGroup(sgi).Number, quantity)
-	}
-
 	pl, ok := c.Planet(c.ShipGroup(sgi).Destination)
 	if !ok {
 		return e.NewGameStateError("planet #%d", c.ShipGroup(sgi).Destination)
@@ -168,15 +166,6 @@ func (c *Cache) shipGroupDismantle(ri int, groupIndex uuid.UUID, quantity uint)
 
 	st := c.ShipGroupShipClass(sgi)
 
-	if quantity > 0 && quantity < c.ShipGroup(sgi).Number {
-		// make new group for disassembly
-		nsgi, err := c.breakGroup(ri, groupIndex, quantity)
-		if err != nil {
-			return err
-		}
-		sgi = nsgi
-	}
-
 	if c.ShipGroup(sgi).CargoType != nil {
 		ct := *c.ShipGroup(sgi).CargoType
 		load := c.ShipGroup(sgi).Load.F()
@@ -204,10 +193,8 @@ func (c *Cache) shipGroupDismantle(ri int, groupIndex uuid.UUID, quantity uint)
 // Корабль может нести только один тип груза одновременно.
 // Возможные типы груза - это колонисты, сырье и промышленность.
 // Груз может быть доставлен на борт корабля с Вашей или не занятой планеты, на которой он имеется.
-func (c *Cache) shipGroupLoad(ri int, groupID uuid.UUID, ct game.CargoType, ships uint, quantity float64) error {
-	if ships == 0 && quantity > 0 {
-		return e.NewCargoQuantityWithoutGroupBreakError()
-	}
+func (c *Cache) shipGroupLoad(ri int, groupID uuid.UUID, ct game.CargoType, quantity float64) error {
+	c.validateRaceIndex(ri)
 	sgi, ok := c.raceShipGroupIndex(ri, groupID)
 	if !ok {
 		return e.NewEntityNotExistsError("group %s", groupID)
@@ -231,13 +218,7 @@ func (c *Cache) shipGroupLoad(ri int, groupID uuid.UUID, ct game.CargoType, ship
 	if c.ShipGroup(sgi).CargoType != nil && *c.ShipGroup(sgi).CargoType != ct {
 		return e.NewCargoLoadNotEqualError("cargo: %v", *c.ShipGroup(sgi).CargoType)
 	}
-	if ships > 0 && ships < c.ShipGroup(sgi).Number {
-		nsgi, err := c.breakGroup(ri, groupID, ships)
-		if err != nil {
-			return err
-		}
-		sgi = nsgi
-	}
+
 	capacity := c.ShipGroup(sgi).CargoCapacity(st)
 	freeShipGroupCargoLoad := capacity - float64(c.ShipGroup(sgi).Load)
 	if freeShipGroupCargoLoad == 0 {
@@ -274,11 +255,8 @@ func (c *Cache) shipGroupLoad(ri int, groupID uuid.UUID, ct game.CargoType, ship
 
 // Промышленность и Сырье могут быть выгружены на любой планете.
 // Колонисты могут быть высажены только на планеты, принадлежащие Вам или на необитаемые планеты.
-func (c *Cache) shipGroupUnload(ri int, groupID uuid.UUID, ships uint, quantity float64) error {
+func (c *Cache) shipGroupUnload(ri int, groupID uuid.UUID, quantity float64) error {
 	c.validateRaceIndex(ri)
-	if ships == 0 && quantity > 0 {
-		return e.NewCargoQuantityWithoutGroupBreakError()
-	}
 	sgi, ok := c.raceShipGroupIndex(ri, groupID)
 	if !ok {
 		return e.NewEntityNotExistsError("group %s", groupID)
@@ -300,13 +278,6 @@ func (c *Cache) shipGroupUnload(ri int, groupID uuid.UUID, ships uint, quantity
 	if ct == game.CargoColonist && p.Owned() && !p.OwnedBy(c.g.Race[ri].ID) {
 		return e.NewEntityNotOwnedError("planet #%d unload %v", p.Number, ct)
 	}
-	if ships > 0 && ships < c.ShipGroup(sgi).Number {
-		nsgi, err := c.breakGroup(ri, groupID, ships)
-		if err != nil {
-			return err
-		}
-		sgi = nsgi
-	}
 
 	toBeUnloaded := quantity
 	if quantity == 0 {
@@ -356,7 +327,8 @@ func (c *Cache) unsafeUnloadCargo(sgi int, q float64) {
 	p.UnpackCapital()
 }
 
-func (c *Cache) shipGroupTransfer(ri, riAccept int, groupID uuid.UUID, quantity uint) (err error) {
+func (c *Cache) shipGroupTransfer(ri, riAccept int, groupID uuid.UUID) (err error) {
+	c.validateRaceIndex(ri)
 	if ri == riAccept {
 		return e.NewSameRaceError(c.g.Race[riAccept].Name)
 	}
@@ -369,9 +341,6 @@ func (c *Cache) shipGroupTransfer(ri, riAccept int, groupID uuid.UUID, quantity
 	if state == game.StateTransfer {
 		return e.NewShipsBusyError("state: %s", state)
 	}
-	if sg.Number < quantity {
-		return e.NewBeakGroupNumberNotEnoughError("%d<%d", sg.Number, quantity)
-	}
 
 	st := c.ShipGroupShipClass(sgi)
 
@@ -402,19 +371,13 @@ func (c *Cache) shipGroupTransfer(ri, riAccept int, groupID uuid.UUID, quantity
 		newGroup.StateTransfer = true
 	}
 
-	if quantity == 0 || quantity == sg.Number {
-		c.unsafeDeleteShipGroup(sgi)
-	} else {
-		newGroup.Number = quantity
-		sg.Number -= quantity
-	}
-
 	c.appendShipGroup(riAccept, &newGroup)
+	c.unsafeDeleteShipGroup(sgi)
 
 	return nil
 }
 
-func (c *Cache) ShipGroupBreak(ri int, groupID uuid.UUID, quantity uint) error {
+func (c *Cache) ShipGroupBreak(ri int, groupID, newID uuid.UUID, quantity uint) error {
 	c.validateRaceIndex(ri)
 	sgi, ok := c.raceShipGroupIndex(ri, groupID)
 	if !ok {
diff --git a/internal/controller/ship_group_move_test.go b/internal/controller/ship_group_move_test.go
index f2f364c..3c9ed93 100644
--- a/internal/controller/ship_group_move_test.go
+++ b/internal/controller/ship_group_move_test.go
@@ -19,8 +19,8 @@ func TestListMoveableGroupIds(t *testing.T) {
 	// 3: idx = 2 / [v] In-Fleet group
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Freighter, R0_Planet_0_num, 10))
 
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "Fleet", c.ShipGroup(1).ID, 0))
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "Fleet", c.ShipGroup(2).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "Fleet", c.ShipGroup(1).ID))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "Fleet", c.ShipGroup(2).ID))
 
 	// 4: idx = 3 / [v] In_Space
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Freighter, R0_Planet_0_num, 7))
@@ -34,7 +34,7 @@ func TestListMoveableGroupIds(t *testing.T) {
 
 	// 6: idx = 5 / [v] Just launched group
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Freighter, R0_Planet_0_num, 10))
-	assert.NoError(t, g.ShipGroupSend(Race_0.Name, c.ShipGroup(5).ID, R0_Planet_2_num, 0))
+	assert.NoError(t, g.ShipGroupSend(Race_0.Name, c.ShipGroup(5).ID, R0_Planet_2_num))
 
 	movableGroups := slices.Collect(c.ListMoveableGroupIds())
 	assert.Len(t, movableGroups, 5)
diff --git a/internal/controller/ship_group_send.go b/internal/controller/ship_group_send.go
index 060b4b8..7e615ea 100644
--- a/internal/controller/ship_group_send.go
+++ b/internal/controller/ship_group_send.go
@@ -7,7 +7,7 @@ import (
 	"github.com/iliadenisov/galaxy/internal/util"
 )
 
-func (c *Cache) shipGroupSend(ri int, groupID uuid.UUID, planetNumber, quantity uint) error {
+func (c *Cache) shipGroupSend(ri int, groupID uuid.UUID, planetNumber uint) error {
 	c.validateRaceIndex(ri)
 
 	sgi, ok := c.raceShipGroupIndex(ri, groupID)
@@ -25,10 +25,6 @@ func (c *Cache) shipGroupSend(ri int, groupID uuid.UUID, planetNumber, quantity
 		return e.NewShipsBusyError("state: %s", c.ShipGroup(sgi).State())
 	}
 
-	if c.ShipGroup(sgi).Number < quantity {
-		return e.NewBeakGroupNumberNotEnoughError("%d<%d", c.ShipGroup(sgi).Number, quantity)
-	}
-
 	p1, ok := c.Planet(sourcePlanet)
 	if !ok {
 		return e.NewGameStateError("source planet #%d does not exists", sourcePlanet)
@@ -42,14 +38,6 @@ func (c *Cache) shipGroupSend(ri int, groupID uuid.UUID, planetNumber, quantity
 		return e.NewSendUnreachableDestinationError("range=%.03f", rangeToDestination)
 	}
 
-	if quantity > 0 && quantity < c.ShipGroup(sgi).Number {
-		nsgi, err := c.breakGroup(ri, groupID, quantity)
-		if err != nil {
-			return err
-		}
-		sgi = nsgi
-	}
-
 	if p1.Number == p2.Number {
 		c.UnsendShips(sgi)
 		c.shipGroupMerge(ri)
diff --git a/internal/controller/ship_group_send_test.go b/internal/controller/ship_group_send_test.go
index b54f247..36ec914 100644
--- a/internal/controller/ship_group_send_test.go
+++ b/internal/controller/ship_group_send_test.go
@@ -1,7 +1,6 @@
 package controller_test
 
 import (
-	"slices"
 	"testing"
 
 	"github.com/google/uuid"
@@ -17,66 +16,39 @@ func TestShipGroupSend(t *testing.T) {
 	assert.NoError(t, c.CreateShips(Race_0_idx, ShipType_Cruiser, R0_Planet_0_num, 10))
 	// group #2 - in_space
 	assert.NoError(t, c.CreateShips(Race_0_idx, ShipType_Cruiser, R0_Planet_0_num, 1))
-	// g.ShipGroups[1].StateInSpace = &game.InSpace{Origin: 2, Range: 1.23}
 	c.ShipGroup(1).StateInSpace = &InSpace
 	// group #3 - in_orbit, unmovable
 	g.ShipClassCreate(Race_0.Name, "Fortress", 0, 50, 30, 100, 0)
 	assert.NoError(t, c.CreateShips(Race_0_idx, "Fortress", R0_Planet_0_num, 1))
 
 	assert.ErrorContains(t,
-		g.ShipGroupSend(UnknownRace, c.ShipGroup(0).ID, 2, 0),
+		g.ShipGroupSend(UnknownRace, c.ShipGroup(0).ID, 2),
 		e.GenericErrorText(e.ErrInputUnknownRace))
 	assert.ErrorContains(t,
-		g.ShipGroupSend(Race_Extinct.Name, c.ShipGroup(0).ID, 2, 0),
+		g.ShipGroupSend(Race_Extinct.Name, c.ShipGroup(0).ID, 2),
 		e.GenericErrorText(e.ErrRaceExinct))
 	assert.ErrorContains(t,
-		g.ShipGroupSend(Race_0.Name, uuid.New(), 2, 0),
+		g.ShipGroupSend(Race_0.Name, uuid.New(), 2),
 		e.GenericErrorText(e.ErrInputEntityNotExists))
 	assert.ErrorContains(t,
-		g.ShipGroupSend(Race_0.Name, c.ShipGroup(0).ID, 222, 0),
+		g.ShipGroupSend(Race_0.Name, c.ShipGroup(0).ID, 222),
 		e.GenericErrorText(e.ErrInputEntityNotExists))
 	assert.ErrorContains(t,
-		g.ShipGroupSend(Race_0.Name, c.ShipGroup(1).ID, 1, 0),
+		g.ShipGroupSend(Race_0.Name, c.ShipGroup(1).ID, 1),
 		e.GenericErrorText(e.ErrShipsBusy))
 	assert.ErrorContains(t,
-		g.ShipGroupSend(Race_0.Name, c.ShipGroup(2).ID, 2, 0),
+		g.ShipGroupSend(Race_0.Name, c.ShipGroup(2).ID, 2),
 		e.GenericErrorText(e.ErrSendShipHasNoDrives))
 	assert.ErrorContains(t,
-		g.ShipGroupSend(Race_0.Name, c.ShipGroup(0).ID, 2, 100),
-		e.GenericErrorText(e.ErrBeakGroupNumberNotEnough))
-	assert.ErrorContains(t,
-		g.ShipGroupSend(Race_0.Name, c.ShipGroup(0).ID, 3, 0),
+		g.ShipGroupSend(Race_0.Name, c.ShipGroup(0).ID, 3),
 		e.GenericErrorText(e.ErrSendUnreachableDestination))
 
-	assert.NoError(t, g.ShipGroupSend(Race_0.Name, c.ShipGroup(0).ID, R0_Planet_2_num, 3)) // send 3 of 10
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 4)
-	assert.Equal(t, uint(7), c.ShipGroup(0).Number)
-	assert.Equal(t, game.StateInOrbit, c.ShipGroup(0).State())
-	assert.Equal(t, uint(3), c.ShipGroup(3).Number)
-	assert.Equal(t, game.StateLaunched, c.ShipGroup(3).State())
-	assert.NotNil(t, c.ShipGroup(3).StateInSpace)
-	assert.Nil(t, c.ShipGroup(3).StateInSpace.X)
-	assert.Nil(t, c.ShipGroup(3).StateInSpace.Y)
-
-	assert.NoError(t, g.ShipGroupSend(Race_0.Name, c.ShipGroup(3).ID, R0_Planet_0_num, 2)) // un-send 2 of 3
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 4)
-
-	assert.Equal(t, uint(9), c.ShipGroup(0).Number)
-	assert.Equal(t, game.StateInOrbit, c.ShipGroup(0).State())
-
-	assert.Equal(t, uint(1), c.ShipGroup(3).Number)
-	assert.Equal(t, game.StateLaunched, c.ShipGroup(3).State())
-	assert.NotNil(t, c.ShipGroup(3).StateInSpace)
-	assert.Nil(t, c.ShipGroup(3).StateInSpace.X)
-	assert.Nil(t, c.ShipGroup(3).StateInSpace.Y)
-
-	assert.NoError(t, g.ShipGroupSend(Race_0.Name, c.ShipGroup(3).ID, R0_Planet_0_num, 0)) // un-send the rest 1
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 3)
-	assert.Equal(t, uint(10), c.ShipGroup(0).Number)
-	assert.Equal(t, game.StateInOrbit, c.ShipGroup(0).State())
-
-	assert.NoError(t, g.ShipGroupSend(Race_0.Name, c.ShipGroup(0).ID, R0_Planet_2_num, 0))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 3)
-	assert.Equal(t, uint(10), c.ShipGroup(0).Number)
+	assert.NoError(t, g.ShipGroupSend(Race_0.Name, c.ShipGroup(0).ID, R0_Planet_2_num)) // send #0
 	assert.Equal(t, game.StateLaunched, c.ShipGroup(0).State())
+	assert.NotNil(t, c.ShipGroup(0).StateInSpace)
+	assert.Nil(t, c.ShipGroup(0).StateInSpace.X)
+	assert.Nil(t, c.ShipGroup(0).StateInSpace.Y)
+
+	assert.NoError(t, g.ShipGroupSend(Race_0.Name, c.ShipGroup(0).ID, R0_Planet_0_num)) // un-send #0
+	assert.Equal(t, game.StateInOrbit, c.ShipGroup(0).State())
 }
diff --git a/internal/controller/ship_group_test.go b/internal/controller/ship_group_test.go
index 5b5ab6c..3db8d1b 100644
--- a/internal/controller/ship_group_test.go
+++ b/internal/controller/ship_group_test.go
@@ -105,29 +105,29 @@ func TestShipGroupBreak(t *testing.T) {
 	c.ShipGroup(1).StateInSpace = &InSpace
 
 	fleet := "R0_Fleet"
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleet, c.ShipGroup(0).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, fleet, c.ShipGroup(0).ID))
 
 	assert.ErrorContains(t,
-		g.ShipGroupBreak(UnknownRace, c.ShipGroup(0).ID, 0),
+		g.ShipGroupBreak(UnknownRace, c.ShipGroup(0).ID, uuid.New(), 1),
 		e.GenericErrorText(e.ErrInputUnknownRace))
 	assert.ErrorContains(t,
-		g.ShipGroupBreak(Race_Extinct.Name, c.ShipGroup(0).ID, 0),
+		g.ShipGroupBreak(Race_Extinct.Name, c.ShipGroup(0).ID, uuid.New(), 1),
 		e.GenericErrorText(e.ErrRaceExinct))
 	assert.ErrorContains(t,
-		g.ShipGroupBreak(Race_0.Name, uuid.New(), 0),
+		g.ShipGroupBreak(Race_0.Name, uuid.New(), uuid.New(), 1),
 		e.GenericErrorText(e.ErrInputEntityNotExists))
 	assert.ErrorContains(t,
-		g.ShipGroupBreak(Race_0.Name, c.ShipGroup(0).ID, 17),
+		g.ShipGroupBreak(Race_0.Name, c.ShipGroup(0).ID, uuid.New(), 17),
 		e.GenericErrorText(e.ErrBeakGroupNumberNotEnough))
 	assert.ErrorContains(t,
-		g.ShipGroupBreak(Race_0.Name, c.ShipGroup(1).ID, 0),
+		g.ShipGroupBreak(Race_0.Name, c.ShipGroup(1).ID, uuid.New(), 1),
 		e.GenericErrorText(e.ErrShipsBusy))
 
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 2)
 	assert.Len(t, slices.Collect(c.ListFleets(Race_0_idx)), 1)
 
 	// group #1 -> group #3 (5 new, 8 left)
-	assert.NoError(t, c.ShipGroupBreak(Race_0_idx, c.ShipGroup(0).ID, 5)) // group #3 (2)
+	assert.NoError(t, c.ShipGroupBreak(Race_0_idx, c.ShipGroup(0).ID, uuid.New(), 5)) // group #3 (2)
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 3)
 	assert.Equal(t, uint(8), c.ShipGroup(0).Number)
 	assert.NotNil(t, c.ShipGroup(0).FleetID)
@@ -138,15 +138,15 @@ func TestShipGroupBreak(t *testing.T) {
 
 	// group #1 -> group #4 (2 new, 6 left)
 	c.ShipGroup(0).CargoType = game.CargoColonist.Ref()
-	c.ShipGroup(0).Load = 32.8                                            // 8 ships
-	assert.NoError(t, c.ShipGroupBreak(Race_0_idx, c.ShipGroup(0).ID, 2)) // group #4 (3)
+	c.ShipGroup(0).Load = 32.8                                                        // 8 ships
+	assert.NoError(t, c.ShipGroupBreak(Race_0_idx, c.ShipGroup(0).ID, uuid.New(), 2)) // group #4 (3)
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 4)
 	assert.Equal(t, uint(6), c.ShipGroup(0).Number)
 	assert.NotNil(t, c.ShipGroup(0).FleetID)
 	assert.Equal(t, uint(2), c.ShipGroup(3).Number)
 	// assert.Equal(t, uint(4), c.ShipGroup(3).Index)
 	assert.Nil(t, c.ShipGroup(3).FleetID)
-	assert.NoError(t, c.ShipGroupJoinFleet(Race_0_idx, fleet, c.ShipGroup(3).ID, 0))
+	assert.NoError(t, c.ShipGroupJoinFleet(Race_0_idx, fleet, c.ShipGroup(3).ID))
 	assert.NotNil(t, c.ShipGroup(3).FleetID)
 
 	assert.Equal(t, game.CargoColonist.Ref(), c.ShipGroup(0).CargoType)
@@ -155,13 +155,13 @@ func TestShipGroupBreak(t *testing.T) {
 	assert.Equal(t, 8.2, number.Fixed3(c.ShipGroup(3).Load.F()))
 
 	// group #1 -> MAX 6 off the fleet
-	assert.NoError(t, g.ShipGroupBreak(Race_0.Name, c.ShipGroup(0).ID, 6)) // group #1 (0)
+	assert.NoError(t, g.ShipGroupBreak(Race_0.Name, c.ShipGroup(0).ID, uuid.New(), 6)) // group #1 (0)
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 4)
 	assert.Equal(t, uint(6), c.ShipGroup(0).Number)
 	assert.Nil(t, c.ShipGroup(0).FleetID)
 
 	// group #4 -> ALL off the fleet
-	assert.NoError(t, g.ShipGroupBreak(Race_0.Name, c.ShipGroup(3).ID, 0)) // group #1 (0)
+	assert.NoError(t, g.ShipGroupBreak(Race_0.Name, c.ShipGroup(3).ID, uuid.New(), 0)) // group #1 (0)
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 4)
 	assert.Equal(t, uint(2), c.ShipGroup(3).Number)
 	assert.Nil(t, c.ShipGroup(3).FleetID)
@@ -173,7 +173,7 @@ func TestShipGroupTransfer(t *testing.T) {
 	assert.NoError(t, c.CreateShips(Race_1_idx, ShipType_Cruiser, R1_Planet_1_num, 23)) // group #2 (1)
 
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Gunship, R0_Planet_0_num, 17)) // group #3 (2) - In_Space
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "R0_Fleet", c.ShipGroup(2).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "R0_Fleet", c.ShipGroup(2).ID))
 	assert.NotNil(t, c.ShipGroup(2).FleetID)
 	c.ShipGroup(2).StateInSpace = &InSpace
 	c.ShipGroup(2).CargoType = game.CargoMaterial.Ref()
@@ -183,74 +183,71 @@ func TestShipGroupTransfer(t *testing.T) {
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_1_idx)), 1)
 
 	assert.ErrorContains(t,
-		g.ShipGroupTransfer(UnknownRace, Race_1.Name, c.ShipGroup(1).ID, 0),
+		g.ShipGroupTransfer(UnknownRace, Race_1.Name, c.ShipGroup(1).ID),
 		e.GenericErrorText(e.ErrInputUnknownRace))
 	assert.ErrorContains(t,
-		g.ShipGroupTransfer(Race_0.Name, UnknownRace, c.ShipGroup(1).ID, 0),
+		g.ShipGroupTransfer(Race_0.Name, UnknownRace, c.ShipGroup(1).ID),
 		e.GenericErrorText(e.ErrInputUnknownRace))
 	assert.ErrorContains(t,
-		g.ShipGroupTransfer(Race_0.Name, Race_Extinct.Name, c.ShipGroup(1).ID, 0),
+		g.ShipGroupTransfer(Race_0.Name, Race_Extinct.Name, c.ShipGroup(1).ID),
 		e.GenericErrorText(e.ErrRaceExinct))
 	assert.ErrorContains(t,
-		g.ShipGroupTransfer(Race_Extinct.Name, Race_1.Name, c.ShipGroup(1).ID, 0),
+		g.ShipGroupTransfer(Race_Extinct.Name, Race_1.Name, c.ShipGroup(1).ID),
 		e.GenericErrorText(e.ErrRaceExinct))
 	assert.ErrorContains(t,
-		g.ShipGroupTransfer(Race_0.Name, Race_0.Name, c.ShipGroup(1).ID, 0),
+		g.ShipGroupTransfer(Race_0.Name, Race_0.Name, c.ShipGroup(1).ID),
 		e.GenericErrorText(e.ErrInputSameRace))
 	assert.ErrorContains(t,
-		g.ShipGroupTransfer(Race_0.Name, Race_1.Name, uuid.New(), 0),
+		g.ShipGroupTransfer(Race_0.Name, Race_1.Name, uuid.New()),
 		e.GenericErrorText(e.ErrInputEntityNotExists))
 	assert.ErrorContains(t,
-		g.ShipGroupTransfer(Race_0.Name, Race_1.Name, c.ShipGroup(2).ID, 18),
-		e.GenericErrorText(e.ErrBeakGroupNumberNotEnough))
-	assert.ErrorContains(t,
-		g.ShipGroupTransfer(Race_0.Name, Race_1.Name, c.ShipGroup(0).ID, 0),
+		g.ShipGroupTransfer(Race_0.Name, Race_1.Name, c.ShipGroup(0).ID),
 		e.GenericErrorText(e.ErrGiveawayGroupShipsTypeNotEqual))
 
-	assert.NoError(t, g.ShipGroupTransfer(Race_0.Name, Race_1.Name, c.ShipGroup(2).ID, 11)) // group #2 (3)
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 2)
+	orig := *c.ShipGroup(2)
+	assert.NoError(t, g.ShipGroupTransfer(Race_0.Name, Race_1.Name, c.ShipGroup(2).ID)) // group #2 (3)
+	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 1)
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_1_idx)), 2)
 
+	newSg := c.ShipGroup(2)
 	assert.Equal(t, c.MustShipClass(Race_1_idx, Race_0_Gunship).Name, c.MustShipClass(Race_0_idx, Race_0_Gunship).Name)
 	assert.Equal(t, c.MustShipClass(Race_1_idx, Race_0_Gunship).Drive, c.MustShipClass(Race_0_idx, Race_0_Gunship).Drive)
 	assert.Equal(t, c.MustShipClass(Race_1_idx, Race_0_Gunship).Weapons, c.MustShipClass(Race_0_idx, Race_0_Gunship).Weapons)
 	assert.Equal(t, c.MustShipClass(Race_1_idx, Race_0_Gunship).Shields, c.MustShipClass(Race_0_idx, Race_0_Gunship).Shields)
 	assert.Equal(t, c.MustShipClass(Race_1_idx, Race_0_Gunship).Cargo, c.MustShipClass(Race_0_idx, Race_0_Gunship).Cargo)
 	assert.Equal(t, c.MustShipClass(Race_1_idx, Race_0_Gunship).Armament, c.MustShipClass(Race_0_idx, Race_0_Gunship).Armament)
-	assert.Equal(t, c.ShipGroup(2).State(), c.ShipGroup(3).State())
-	assert.Equal(t, c.ShipGroup(2).CargoType, c.ShipGroup(3).CargoType)
-	assert.Equal(t, c.ShipGroup(2).Load, c.ShipGroup(3).Load)
-	assert.Equal(t, c.ShipGroup(2).TechLevel(game.TechDrive), c.ShipGroup(3).TechLevel(game.TechDrive))
-	assert.Equal(t, c.ShipGroup(2).TechLevel(game.TechWeapons), c.ShipGroup(3).TechLevel(game.TechWeapons))
-	assert.Equal(t, c.ShipGroup(2).TechLevel(game.TechShields), c.ShipGroup(3).TechLevel(game.TechShields))
-	assert.Equal(t, c.ShipGroup(2).TechLevel(game.TechCargo), c.ShipGroup(3).TechLevel(game.TechCargo))
-	assert.Equal(t, c.ShipGroup(2).Destination, c.ShipGroup(3).Destination)
-	assert.Equal(t, c.ShipGroup(2).StateInSpace, c.ShipGroup(3).StateInSpace)
-	assert.Equal(t, c.ShipGroup(2).StateUpgrade, c.ShipGroup(3).StateUpgrade)
-	assert.Equal(t, c.ShipGroup(2).StateTransfer, c.ShipGroup(3).StateTransfer)
-	assert.Equal(t, c.ShipGroup(3).OwnerID, Race_1_ID)
-	assert.Equal(t, c.ShipGroup(3).TypeID, c.MustShipClass(Race_1_idx, Race_0_Gunship).ID)
-	assert.Equal(t, c.ShipGroup(3).Number, uint(11))
-	assert.Nil(t, c.ShipGroup(3).FleetID)
-
-	assert.NoError(t, g.ShipGroupTransfer(Race_1.Name, Race_0.Name, c.ShipGroup(3).ID, 11))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 3)
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_1_idx)), 1)
+	assert.Equal(t, orig.State(), newSg.State())
+	assert.Equal(t, orig.CargoType, newSg.CargoType)
+	assert.Equal(t, orig.Load, newSg.Load)
+	assert.Equal(t, orig.TechLevel(game.TechDrive), newSg.TechLevel(game.TechDrive))
+	assert.Equal(t, orig.TechLevel(game.TechWeapons), newSg.TechLevel(game.TechWeapons))
+	assert.Equal(t, orig.TechLevel(game.TechShields), newSg.TechLevel(game.TechShields))
+	assert.Equal(t, orig.TechLevel(game.TechCargo), newSg.TechLevel(game.TechCargo))
+	assert.Equal(t, orig.Destination, newSg.Destination)
+	assert.Equal(t, orig.StateInSpace, newSg.StateInSpace)
+	assert.Equal(t, orig.StateUpgrade, newSg.StateUpgrade)
+	assert.Equal(t, orig.StateTransfer, newSg.StateTransfer)
+	assert.Equal(t, newSg.TypeID, c.MustShipClass(Race_1_idx, Race_0_Gunship).ID)
+	assert.Equal(t, orig.Number, newSg.Number)
+	assert.Equal(t, Race_1_ID, newSg.OwnerID)
+	assert.Nil(t, newSg.FleetID)
 
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Gunship, R0_Planet_0_num, 1))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 4)
-	assert.Equal(t, game.StateInOrbit, c.ShipGroup(4).State())
-	assert.NoError(t, g.ShipGroupSend(Race_0.Name, c.ShipGroup(4).ID, R0_Planet_2_num, 0))
-	assert.Equal(t, game.StateLaunched, c.ShipGroup(4).State())
-	assert.Equal(t, c.ShipGroup(4).OwnerID, Race_0_ID)
+	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 2)
+	sg := c.ShipGroup(3)
+	assert.Equal(t, game.StateInOrbit, sg.State())
+	assert.NoError(t, g.ShipGroupSend(Race_0.Name, sg.ID, R0_Planet_2_num))
+	assert.Equal(t, game.StateLaunched, sg.State())
+	assert.Equal(t, sg.OwnerID, Race_0_ID)
 
-	assert.NoError(t, g.ShipGroupTransfer(Race_0.Name, Race_1.Name, c.ShipGroup(4).ID, 0))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 3)
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_1_idx)), 2)
-	assert.Equal(t, game.StateTransfer, c.ShipGroup(4).State())
-	assert.Equal(t, c.ShipGroup(4).OwnerID, Race_1_ID)
+	assert.NoError(t, g.ShipGroupTransfer(Race_0.Name, Race_1.Name, sg.ID))
+	sg = c.ShipGroup(3)
+	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 1)
+	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_1_idx)), 3)
+	assert.Equal(t, game.StateTransfer, sg.State())
+	assert.Equal(t, sg.OwnerID, Race_1_ID)
 	assert.ErrorContains(t,
-		g.ShipGroupTransfer(Race_1.Name, Race_0.Name, c.ShipGroup(4).ID, 0),
+		g.ShipGroupTransfer(Race_1.Name, Race_0.Name, sg.ID),
 		e.GenericErrorText(e.ErrShipsBusy))
 }
 
@@ -280,98 +277,84 @@ func TestShipGroupLoad(t *testing.T) {
 
 	// tests
 	assert.ErrorContains(t,
-		g.ShipGroupLoad(UnknownRace, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0, 0),
+		g.ShipGroupLoad(UnknownRace, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0),
 		e.GenericErrorText(e.ErrInputUnknownRace))
 	assert.ErrorContains(t,
-		g.ShipGroupLoad(Race_Extinct.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0, 0),
+		g.ShipGroupLoad(Race_Extinct.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0),
 		e.GenericErrorText(e.ErrRaceExinct))
 	assert.ErrorContains(t,
-		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, "GOLD", 0, 0),
+		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, "GOLD", 0),
 		e.GenericErrorText(e.ErrInputCargoTypeInvalid))
 	assert.ErrorContains(t,
-		g.ShipGroupLoad(Race_0.Name, uuid.New(), game.CargoMaterial.String(), 0, 0),
+		g.ShipGroupLoad(Race_0.Name, uuid.New(), game.CargoMaterial.String(), 0),
 		e.GenericErrorText(e.ErrInputEntityNotExists))
 	assert.ErrorContains(t,
-		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(2).ID, game.CargoMaterial.String(), 0, 0),
+		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(2).ID, game.CargoMaterial.String(), 0),
 		e.GenericErrorText(e.ErrShipsBusy))
 	assert.ErrorContains(t,
-		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(4).ID, game.CargoMaterial.String(), 0, 0),
+		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(4).ID, game.CargoMaterial.String(), 0),
 		e.GenericErrorText(e.ErrInputEntityNotOwned))
 	assert.ErrorContains(t,
-		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(1).ID, game.CargoMaterial.String(), 0, 0),
+		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(1).ID, game.CargoMaterial.String(), 0),
 		e.GenericErrorText(e.ErrInputNoCargoBay))
 	assert.ErrorContains(t,
-		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(3).ID, game.CargoMaterial.String(), 0, 0),
+		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(3).ID, game.CargoMaterial.String(), 0),
 		e.GenericErrorText(e.ErrInputCargoLoadNotEqual))
 
 	// initial planet is empty
 	assert.ErrorContains(t,
-		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0, 0),
+		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0),
 		e.GenericErrorText(e.ErrInputCargoLoadNotEnough))
 	// add cargo to planet
 	c.PutMaterial(R0_Planet_0_num, 100)
 	// not enough on the planet
 	assert.ErrorContains(t,
-		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 11, 101),
+		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 101),
 		e.GenericErrorText(e.ErrInputCargoLoadNotEnough))
-	// quantity > ships
-	assert.ErrorContains(t,
-		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0, 1),
-		e.GenericErrorText(e.ErrInputCargoQuantityWithoutGroupBreak))
 
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 5)
 
-	// break group and load maximum
-	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 2, 0))
-	assert.Equal(t, 58.0, c.MustPlanet(R0_Planet_0_num).Material.F())
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 6)
-	assert.Nil(t, c.ShipGroup(0).CargoType)
-	assert.Equal(t, game.CargoMaterial.Ref(), c.ShipGroup(5).CargoType)
-	assert.Equal(t, uint(9), c.ShipGroup(0).Number)
-	assert.Equal(t, 0.0, c.ShipGroup(0).Load.F())
-	assert.Equal(t, uint(2), c.ShipGroup(5).Number)
-	assert.Equal(t, 42.0, c.ShipGroup(5).Load.F())
+	// load maximum
+	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0))
+	assert.Equal(t, 0.0, c.MustPlanet(R0_Planet_0_num).Material.F())
+	assert.Equal(t, game.CargoMaterial.Ref(), c.ShipGroup(0).CargoType)
+	assert.Equal(t, 100.0, c.ShipGroup(0).Load.F())
 
-	// break group and load limited
-	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 2, 18))
-	assert.Equal(t, 40.0, c.MustPlanet(R0_Planet_0_num).Material.F())
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 7)
-	assert.Nil(t, c.ShipGroup(0).CargoType)
-	assert.Equal(t, game.CargoMaterial.Ref(), c.ShipGroup(6).CargoType)
-	assert.Equal(t, uint(7), c.ShipGroup(0).Number)
-	assert.Equal(t, 0.0, c.ShipGroup(0).Load.F())
-	assert.Equal(t, uint(2), c.ShipGroup(6).Number)
-	assert.Equal(t, 18.0, c.ShipGroup(6).Load.F())
+	assert.NoError(t, g.ShipGroupUnload(Race_0.Name, c.ShipGroup(0).ID, 0))
+
+	// load limited
+	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 18))
+	assert.Equal(t, 82.0, c.MustPlanet(R0_Planet_0_num).Material.F())
+	assert.Equal(t, game.CargoMaterial.Ref(), c.ShipGroup(0).CargoType)
+	assert.Equal(t, 18.0, c.ShipGroup(0).Load.F())
+
+	assert.NoError(t, g.ShipGroupUnload(Race_0.Name, c.ShipGroup(0).ID, 0))
 
 	// add cargo to planet
 	c.PutMaterial(R0_Planet_0_num, 100)
 	// loading all available cargo
-	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0, 0))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 7)
+	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0))
 	assert.Equal(t, 0.0, c.MustPlanet(R0_Planet_0_num).Material.F())
 	assert.Equal(t, 100.0, c.ShipGroup(0).Load.F()) // free: 131.0
 	assert.Equal(t, game.CargoMaterial.Ref(), c.ShipGroup(0).CargoType)
 
 	// add cargo to planet
 	c.PutMaterial(R0_Planet_0_num, 200)
-	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 11, 31))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 7)
+	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 31))
 	assert.Equal(t, 169.0, c.MustPlanet(R0_Planet_0_num).Material.F())
 	assert.Equal(t, 131.0, c.ShipGroup(0).Load.F()) // free: 100.0
 	assert.Equal(t, game.CargoMaterial.Ref(), c.ShipGroup(0).CargoType)
 
 	// load to maximum cargo space left
-	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 11, 0))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 7)
-	assert.Equal(t, 153.0, c.MustPlanet(R0_Planet_0_num).Material.F())
-	assert.Equal(t, 147.0, c.ShipGroup(0).Load.F()) // free: 0.0
+	assert.NoError(t, g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0))
+	assert.Equal(t, 69.0, c.MustPlanet(R0_Planet_0_num).Material.F())
+	assert.Equal(t, 231.0, c.ShipGroup(0).Load.F()) // free: 0.0
 	assert.Equal(t, game.CargoMaterial.Ref(), c.ShipGroup(0).CargoType)
 
 	// ship group is full
 	assert.ErrorContains(t,
-		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0, 0),
+		g.ShipGroupLoad(Race_0.Name, c.ShipGroup(0).ID, game.CargoMaterial.String(), 0),
 		e.GenericErrorText(e.ErrInputCargoLoadNoSpaceLeft))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 7)
 }
 
 func TestShipGroupUnload(t *testing.T) {
@@ -408,67 +391,51 @@ func TestShipGroupUnload(t *testing.T) {
 
 	// tests
 	assert.ErrorContains(t,
-		g.ShipGroupUnload(UnknownRace, c.ShipGroup(0).ID, 0, 0),
+		g.ShipGroupUnload(UnknownRace, c.ShipGroup(0).ID, 0),
 		e.GenericErrorText(e.ErrInputUnknownRace))
 	assert.ErrorContains(t,
-		g.ShipGroupUnload(Race_Extinct.Name, c.ShipGroup(0).ID, 0, 0),
+		g.ShipGroupUnload(Race_Extinct.Name, c.ShipGroup(0).ID, 0),
 		e.GenericErrorText(e.ErrRaceExinct))
 	assert.ErrorContains(t,
-		g.ShipGroupUnload(Race_0.Name, uuid.New(), 0, 0),
+		g.ShipGroupUnload(Race_0.Name, uuid.New(), 0),
 		e.GenericErrorText(e.ErrInputEntityNotExists))
 	assert.ErrorContains(t,
-		g.ShipGroupUnload(Race_0.Name, c.ShipGroup(2).ID, 0, 0),
+		g.ShipGroupUnload(Race_0.Name, c.ShipGroup(2).ID, 0),
 		e.GenericErrorText(e.ErrShipsBusy))
 	assert.ErrorContains(t,
-		g.ShipGroupUnload(Race_0.Name, c.ShipGroup(1).ID, 0, 0),
+		g.ShipGroupUnload(Race_0.Name, c.ShipGroup(1).ID, 0),
 		e.GenericErrorText(e.ErrInputNoCargoBay))
 	assert.ErrorContains(t,
-		g.ShipGroupUnload(Race_0.Name, c.ShipGroup(0).ID, 0, 0),
+		g.ShipGroupUnload(Race_0.Name, c.ShipGroup(0).ID, 0),
 		e.GenericErrorText(e.ErrInputCargoUnloadEmpty))
 	assert.ErrorContains(t,
-		g.ShipGroupUnload(Race_0.Name, c.ShipGroup(4).ID, 0, 0),
+		g.ShipGroupUnload(Race_0.Name, c.ShipGroup(4).ID, 0),
 		e.GenericErrorText(e.ErrInputEntityNotOwned))
 	c.ShipGroup(0).CargoType = game.CargoColonist.Ref()
 	c.ShipGroup(0).Load = 100
 	assert.ErrorContains(t,
-		g.ShipGroupUnload(Race_0.Name, c.ShipGroup(0).ID, 11, 101),
+		g.ShipGroupUnload(Race_0.Name, c.ShipGroup(0).ID, 101),
 		e.GenericErrorText(e.ErrInputCargoUnoadNotEnough))
-	assert.ErrorContains(t,
-		g.ShipGroupUnload(Race_0.Name, c.ShipGroup(0).ID, 0, 1),
-		e.GenericErrorText(e.ErrInputCargoQuantityWithoutGroupBreak))
 
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 6)
 
-	// unload MAT on foreign planet / break group
-	assert.NoError(t, g.ShipGroupUnload(Race_0.Name, c.ShipGroup(5).ID, 3, 0))
-	assert.Equal(t, 27.273, number.Fixed3(c.MustPlanet(R1_Planet_1_num).Material.F()))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 7)
-	assert.Equal(t, uint(3), c.ShipGroup(6).Number)
-	assert.Equal(t, 0., c.ShipGroup(6).Load.F())
-	assert.Nil(t, c.ShipGroup(6).CargoType)
-	assert.Equal(t, 0.0, c.ShipGroup(6).Load.F())
+	// unload MAT on foreign planet / limited
+	assert.NoError(t, g.ShipGroupUnload(Race_0.Name, c.ShipGroup(5).ID, 20.1))
+	assert.Equal(t, 20.1, number.Fixed3(c.MustPlanet(R1_Planet_1_num).Material.F()))
 	assert.Equal(t, game.CargoMaterial.Ref(), c.ShipGroup(5).CargoType)
-	assert.Equal(t, uint(8), c.ShipGroup(5).Number)
-	assert.Equal(t, 72.727, number.Fixed3(c.ShipGroup(5).Load.F()))
+	assert.Equal(t, 79.9, number.Fixed3(c.ShipGroup(5).Load.F()))
 
-	// unload MAT on foreign planet / break group / limited MAT
-	assert.NoError(t, g.ShipGroupUnload(Race_0.Name, c.ShipGroup(5).ID, 3, 20.0))
-	assert.Equal(t, 47.273, number.Fixed3(c.MustPlanet(R1_Planet_1_num).Material.F()))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 8)
-	assert.Equal(t, uint(3), c.ShipGroup(7).Number)
-	assert.Equal(t, game.CargoMaterial.Ref(), c.ShipGroup(7).CargoType)
-	assert.Equal(t, 7.273, number.Fixed3(c.ShipGroup(7).Load.F()))
-	assert.Equal(t, game.CargoMaterial.Ref(), c.ShipGroup(5).CargoType)
-	assert.Equal(t, uint(5), c.ShipGroup(5).Number)
-	assert.Equal(t, 45.455, number.Fixed3(c.ShipGroup(5).Load.F()))
+	// unload MAT on foreign planet / ALL
+	assert.NoError(t, g.ShipGroupUnload(Race_0.Name, c.ShipGroup(5).ID, 0))
+	assert.Equal(t, 100.0, number.Fixed3(c.MustPlanet(R1_Planet_1_num).Material.F()))
+	assert.Equal(t, 0.0, number.Fixed3(c.ShipGroup(5).Load.F()))
+	assert.Nil(t, c.ShipGroup(5).CargoType)
 
 	// unload ALL
-	assert.NoError(t, g.ShipGroupUnload(Race_0.Name, c.ShipGroup(0).ID, 0, 0))
+	assert.NoError(t, g.ShipGroupUnload(Race_0.Name, c.ShipGroup(0).ID, 0))
 	assert.Equal(t, 100.0, number.Fixed3(c.MustPlanet(R0_Planet_0_num).Colonists.F()))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 8)
-	assert.Equal(t, uint(10), c.ShipGroup(0).Number)
-	assert.Nil(t, c.ShipGroup(0).CargoType)
 	assert.Equal(t, 0.0, number.Fixed3(c.ShipGroup(0).Load.F()))
+	assert.Nil(t, c.ShipGroup(0).CargoType)
 }
 
 func TestShipGroupDismantle(t *testing.T) {
@@ -502,26 +469,23 @@ func TestShipGroupDismantle(t *testing.T) {
 
 	// tests
 	assert.ErrorContains(t,
-		g.ShipGroupDismantle(UnknownRace, c.ShipGroup(0).ID, 0),
+		g.ShipGroupDismantle(UnknownRace, c.ShipGroup(0).ID),
 		e.GenericErrorText(e.ErrInputUnknownRace))
 	assert.ErrorContains(t,
-		g.ShipGroupDismantle(Race_Extinct.Name, c.ShipGroup(0).ID, 0),
+		g.ShipGroupDismantle(Race_Extinct.Name, c.ShipGroup(0).ID),
 		e.GenericErrorText(e.ErrRaceExinct))
 	assert.ErrorContains(t,
-		g.ShipGroupDismantle(Race_0.Name, uuid.New(), 0),
+		g.ShipGroupDismantle(Race_0.Name, uuid.New()),
 		e.GenericErrorText(e.ErrInputEntityNotExists))
 	assert.ErrorContains(t,
-		g.ShipGroupDismantle(Race_0.Name, c.ShipGroup(1).ID, 0),
+		g.ShipGroupDismantle(Race_0.Name, c.ShipGroup(1).ID),
 		e.GenericErrorText(e.ErrShipsBusy))
-	assert.ErrorContains(t,
-		g.ShipGroupDismantle(Race_0.Name, c.ShipGroup(2).ID, 12),
-		e.GenericErrorText(e.ErrBeakGroupNumberNotEnough))
 
 	groupEmptyMass := c.ShipGroup(4).EmptyMass(c.MustShipClass(Race_0_idx, Race_0_Freighter))
 	planetMAT := c.MustPlanet(R1_Planet_1_num).Material.F()
 	planetCOL := c.MustPlanet(R1_Planet_1_num).Colonists.F()
 
-	assert.NoError(t, g.ShipGroupDismantle(Race_0.Name, c.ShipGroup(4).ID, 0))
+	assert.NoError(t, g.ShipGroupDismantle(Race_0.Name, c.ShipGroup(4).ID))
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 4)
 	assert.Equal(t, planetMAT+groupEmptyMass, c.MustPlanet(R1_Planet_1_num).Material.F())
 	assert.Equal(t, planetCOL, c.MustPlanet(R1_Planet_1_num).Colonists.F())
@@ -529,31 +493,9 @@ func TestShipGroupDismantle(t *testing.T) {
 	groupEmptyMass = c.ShipGroup(3).EmptyMass(c.MustShipClass(Race_0_idx, Race_0_Freighter))
 	groupLoadMAT := c.ShipGroup(3).Load.F()
 	planetMAT = c.MustPlanet(R1_Planet_1_num).Material.F()
-	assert.NoError(t, g.ShipGroupDismantle(Race_0.Name, c.ShipGroup(3).ID, 0))
+	assert.NoError(t, g.ShipGroupDismantle(Race_0.Name, c.ShipGroup(3).ID))
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 3)
 	assert.Equal(t, planetMAT+groupEmptyMass+groupLoadMAT, c.MustPlanet(R1_Planet_1_num).Material.F())
-
-	groupEmptyMass = c.ShipGroup(2).EmptyMass(c.MustShipClass(Race_0_idx, Race_0_Freighter))
-	planetMAT = c.MustPlanet(R0_Planet_0_num).Material.F()
-	planetCOL = c.MustPlanet(R0_Planet_0_num).Colonists.F()
-	planetPOP := 90.0
-
-	c.PutPopulation(R0_Planet_0_num, planetPOP)
-	assert.Equal(t, planetPOP, c.MustPlanet(R0_Planet_0_num).Population.F())
-	var quantity uint = 3
-	groupEmptyMass = groupEmptyMass / float64(c.ShipGroup(2).Number) * float64(quantity)
-	newGroupUnloadedCOL := c.ShipGroup(2).Load.F() / float64(c.ShipGroup(2).Number) * float64(quantity)
-	expectPOPIncrease := newGroupUnloadedCOL * 8
-	freePOPLeft := c.MustPlanet(R0_Planet_0_num).Size.F() - c.MustPlanet(R0_Planet_0_num).Population.F()
-	expectAddedCOL := (expectPOPIncrease - freePOPLeft) / 8
-	expectAddedPOP := freePOPLeft
-	assert.NoError(t, g.ShipGroupDismantle(Race_0.Name, c.ShipGroup(2).ID, quantity))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 3)
-	assert.Equal(t, planetCOL+expectAddedCOL, c.MustPlanet(R0_Planet_0_num).Colonists.F())
-	assert.Equal(t, planetPOP+expectAddedPOP, c.MustPlanet(R0_Planet_0_num).Population.F())
-	assert.Equal(t, planetMAT+groupEmptyMass, c.MustPlanet(R0_Planet_0_num).Material.F())
-	assert.Equal(t, uint(7), c.ShipGroup(2).Number)
-	assert.Equal(t, 56.0, c.ShipGroup(2).Load.F())
 }
 
 func TestShipGroupDestroyItem(t *testing.T) {
@@ -578,7 +520,7 @@ func TestUnsafeDeleteShipGroup(t *testing.T) {
 
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Gunship, R0_Planet_0_num, 3)) // 0
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Gunship, R0_Planet_2_num, 5)) // 1
-	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "Fleet", c.ShipGroup(0).ID, 0))
+	assert.NoError(t, g.ShipGroupJoinFleet(Race_0.Name, "Fleet", c.ShipGroup(0).ID))
 	assert.NoError(t, c.CreateShips(Race_0_idx, Race_0_Freighter, R0_Planet_2_num, 7)) // 2
 
 	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 3)
diff --git a/internal/controller/ship_group_upgrade.go b/internal/controller/ship_group_upgrade.go
index 1671dc4..a81b221 100644
--- a/internal/controller/ship_group_upgrade.go
+++ b/internal/controller/ship_group_upgrade.go
@@ -10,7 +10,7 @@ import (
 	"github.com/iliadenisov/galaxy/internal/model/game"
 )
 
-func (c *Cache) shipGroupUpgrade(ri int, groupID uuid.UUID, techInput string, limitShips uint, limitLevel float64) error {
+func (c *Cache) shipGroupUpgrade(ri int, groupID uuid.UUID, techInput string, limitLevel float64) error {
 	c.validateRaceIndex(ri)
 	sgi, ok := c.raceShipGroupIndex(ri, groupID)
 	if !ok {
@@ -77,11 +77,6 @@ func (c *Cache) shipGroupUpgrade(ri int, groupID uuid.UUID, techInput string, li
 	}
 
 	shipsToUpgrade := sg.Number
-	// НЕ БОЛЕЕ УКАЗАННОГО
-	if limitShips > 0 && shipsToUpgrade > limitShips {
-		shipsToUpgrade = limitShips
-	}
-
 	maxUpgradableShips := uc.UpgradeMaxShips(productionCapacity)
 
 	/*
diff --git a/internal/controller/ship_group_upgrade_test.go b/internal/controller/ship_group_upgrade_test.go
index 0052cc8..420dcb7 100644
--- a/internal/controller/ship_group_upgrade_test.go
+++ b/internal/controller/ship_group_upgrade_test.go
@@ -1,7 +1,6 @@
 package controller_test
 
 import (
-	"slices"
 	"testing"
 
 	"github.com/google/uuid"
@@ -126,50 +125,52 @@ func TestShipGroupUpgrade(t *testing.T) {
 	c.ShipGroup(2).Destination = R1_Planet_1_num
 
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(UnknownRace, c.ShipGroup(0).ID, "DRIVE", 0, 0),
+		g.ShipGroupUpgrade(UnknownRace, c.ShipGroup(0).ID, "DRIVE", 0),
 		e.GenericErrorText(e.ErrInputUnknownRace))
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(Race_Extinct.Name, c.ShipGroup(0).ID, "DRIVE", 0, 0),
+		g.ShipGroupUpgrade(Race_Extinct.Name, c.ShipGroup(0).ID, "DRIVE", 0),
 		e.GenericErrorText(e.ErrRaceExinct))
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(Race_0.Name, uuid.New(), "DRIVE", 0, 0),
+		g.ShipGroupUpgrade(Race_0.Name, uuid.New(), "DRIVE", 0),
 		e.GenericErrorText(e.ErrInputEntityNotExists))
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(1).ID, "DRIVE", 0, 0),
+		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(1).ID, "DRIVE", 0),
 		e.GenericErrorText(e.ErrShipsBusy))
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(2).ID, "DRIVE", 0, 0),
+		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(2).ID, "DRIVE", 0),
 		e.GenericErrorText(e.ErrInputEntityNotOwned))
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "GUN", 0, 0),
+		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "GUN", 0),
 		e.GenericErrorText(e.ErrInputTechUnknown))
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "CARGO", 0, 0),
+		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "CARGO", 0),
 		e.GenericErrorText(e.ErrInputUpgradeShipTechNotUsed))
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "ALL", 0, 2.0),
+		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "ALL", 2.0),
 		e.GenericErrorText(e.ErrInputUpgradeParameterNotAllowed))
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "DRIVE", 0, 2.0),
+		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "DRIVE", 2.0),
 		e.GenericErrorText(e.ErrInputUpgradeTechLevelInsufficient))
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "DRIVE", 0, 1.1),
+		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "DRIVE", 1.1),
 		e.GenericErrorText(e.ErrInputUpgradeShipsAlreadyUpToDate))
 
 	c.RaceTechLevel(Race_0_idx, game.TechDrive, 10.0)
 	assert.Equal(t, 10.0, c.Race(Race_0_idx).TechLevel(game.TechDrive))
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "DRIVE", 0, 10.0),
+		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "DRIVE", 10.0),
 		e.GenericErrorText(e.ErrUpgradeInsufficientResources))
 
-	assert.NoError(t, g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "DRIVE", 2, 1.2))
-	assert.Len(t, slices.Collect(c.RaceShipGroups(Race_0_idx)), 4)
-	assert.Equal(t, uint(8), c.ShipGroup(0).Number)
-	assert.Equal(t, uint(2), c.ShipGroup(3).Number)
+	assert.NoError(t, g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(0).ID, "DRIVE", 1.3))
 	assert.Equal(t, game.StateInOrbit, c.ShipGroup(0).State())
+	assert.Equal(t, uint(6), c.ShipGroup(0).Number)
 	assert.Equal(t, game.StateUpgrade, c.ShipGroup(3).State())
+	assert.Equal(t, uint(4), c.ShipGroup(3).Number)
+	assert.NotNil(t, c.ShipGroup(3).StateUpgrade)
+	assert.Equal(t, 1.3, c.ShipGroup(3).StateUpgrade.UpgradeTech[0].Level.F())
+	assert.Equal(t, "DRIVE", c.ShipGroup(3).StateUpgrade.UpgradeTech[0].Tech.String())
 
 	assert.ErrorContains(t,
-		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(3).ID, "DRIVE", 1, 1.3),
+		g.ShipGroupUpgrade(Race_0.Name, c.ShipGroup(3).ID, "DRIVE", 1.3),
 		e.GenericErrorText(e.ErrShipsBusy))
 }
diff --git a/internal/error/generic.go b/internal/error/generic.go
index 1bd34eb..8d01302 100644
--- a/internal/error/generic.go
+++ b/internal/error/generic.go
@@ -18,7 +18,6 @@ const (
 	ErrDeleteShipTypePlanetProduction = 5001
 	ErrDeleteSciencePlanetProduction  = 5002
 	ErrMergeShipTypeNotEqual          = 5003
-	ErrJoinFleetGroupNumberNotEnough  = 5004
 	ErrBeakGroupNumberNotEnough       = 5005
 	ErrEntityInUse                    = 5006
 	ErrShipsBusy                      = 5007
@@ -51,7 +50,6 @@ const (
 	ErrInputScienceSumValues
 	ErrInputProductionInvalid
 	ErrInputCargoTypeInvalid
-	ErrInputCargoQuantityWithoutGroupBreak
 	ErrInputCargoLoadNotEnough
 	ErrInputCargoLoadNotEqual
 	ErrInputNoCargoBay
@@ -123,8 +121,6 @@ func GenericErrorText(code int) string {
 		return "Invalid Production type"
 	case ErrInputCargoTypeInvalid:
 		return "Invalid cargo type"
-	case ErrInputCargoQuantityWithoutGroupBreak:
-		return "Cargo quantity should be specified only for a new group number of ships"
 	case ErrInputCargoLoadNotEnough:
 		return "Not enough cargo to load"
 	case ErrInputCargoLoadNotEqual:
@@ -141,8 +137,6 @@ func GenericErrorText(code int) string {
 		return "Illegal ships number to make new group"
 	case ErrMergeShipTypeNotEqual:
 		return "Source and target ship types are not the same"
-	case ErrJoinFleetGroupNumberNotEnough:
-		return "Not enough ships in the group to join a fleet"
 	case ErrBeakGroupNumberNotEnough:
 		return "Not enough ships in the group to make a separate group"
 	case ErrShipsBusy:
diff --git a/internal/error/input.go b/internal/error/input.go
index a2125df..f4a638a 100644
--- a/internal/error/input.go
+++ b/internal/error/input.go
@@ -80,10 +80,6 @@ func NewCargoTypeInvalidError(arg ...any) error {
 	return newGenericError(ErrInputCargoTypeInvalid, arg...)
 }
 
-func NewCargoQuantityWithoutGroupBreakError(arg ...any) error {
-	return newGenericError(ErrInputCargoQuantityWithoutGroupBreak, arg...)
-}
-
 func NewCargoLoadNotEnoughError(arg ...any) error {
 	return newGenericError(ErrInputCargoLoadNotEnough, arg...)
 }
@@ -116,10 +112,6 @@ func NewMergeShipTypeNotEqualError(arg ...any) error {
 	return newGenericError(ErrMergeShipTypeNotEqual, arg...)
 }
 
-func NewJoinFleetGroupNumberNotEnoughError(arg ...any) error {
-	return newGenericError(ErrJoinFleetGroupNumberNotEnough, arg...)
-}
-
 func NewBeakGroupNumberNotEnoughError(arg ...any) error {
 	return newGenericError(ErrBeakGroupNumberNotEnough, arg...)
 }
diff --git a/internal/model/rest/command.go b/internal/model/rest/command.go
index 4d82d06..78a1916 100644
--- a/internal/model/rest/command.go
+++ b/internal/model/rest/command.go
@@ -87,14 +87,12 @@ type CommandShipGroupLoad struct {
 	CommandMeta
 	ID       string  `json:"id" binding:"required,uuid_rfc4122"`
 	Cargo    string  `json:"cargo" binding:"required,notblank,oneof=COL MAT CAP"`
-	Ships    int     `json:"ships" binding:"gte=0"`
 	Quantity float64 `json:"quantity" binding:"gte=0"`
 }
 
 type CommandShipGroupUnload struct {
 	CommandMeta
 	ID       string  `json:"id" binding:"required,uuid_rfc4122"`
-	Ships    int     `json:"ships" binding:"gte=0"`
 	Quantity float64 `json:"quantity" binding:"gte=0"`
 }
 
@@ -102,15 +100,13 @@ type CommandShipGroupSend struct {
 	CommandMeta
 	ID          string `json:"id" binding:"required,uuid_rfc4122"`
 	Destination int    `json:"planetNumber" binding:"gte=0"`
-	Quantity    int    `json:"quantity" binding:"gte=0"`
 }
 
 type CommandShipGroupUpgrade struct {
 	CommandMeta
-	ID       string `json:"id" binding:"required,uuid_rfc4122"`
-	Tech     string `json:"tech" binding:"oneof=ALL DRIVE WEAPONS SHIELDS CARGO"`
-	MaxShips int    `json:"maxShips" binding:"gte=0"`
-	Level    int    `json:"level" binding:"gte=1"`
+	ID    string `json:"id" binding:"required,uuid_rfc4122"`
+	Tech  string `json:"tech" binding:"oneof=ALL DRIVE WEAPONS SHIELDS CARGO"`
+	Level int    `json:"level" binding:"gte=1"`
 }
 
 type CommandShipGroupMerge struct {
@@ -125,22 +121,19 @@ type CommandShipGroupBreak struct {
 
 type CommandShipGroupDismantle struct {
 	CommandMeta
-	ID       string `json:"id" binding:"required,uuid_rfc4122"`
-	Quantity int    `json:"quantity" binding:"gte=0"`
+	ID string `json:"id" binding:"required,uuid_rfc4122"`
 }
 
 type CommandShipGroupTransfer struct {
 	CommandMeta
 	ID       string `json:"id" binding:"required,uuid_rfc4122"`
 	Acceptor string `json:"acceptor" binding:"required,notblank"`
-	Quantity int    `json:"quantity" binding:"gte=0"`
 }
 
 type CommandShipGroupJoinFleet struct {
 	CommandMeta
-	ID       string `json:"id" binding:"required,uuid_rfc4122"`
-	Name     string `json:"name" binding:"required,notblank,entity"`
-	Quantity int    `json:"quantity" binding:"gte=0"`
+	ID   string `json:"id" binding:"required,uuid_rfc4122"`
+	Name string `json:"name" binding:"required,notblank,entity"`
 }
 
 type CommandFleetMerge struct {