Carrier (and other naval units) with brigade by event

[Abominus]

Greetings!

I tried to add carriers (etc.) with cag but only the unit appears:

#########################################################################
#  Navaltech - Träger 1 / 9
#########################################################################
event = {
	id = 840187
	random = no
	invention = yes

	trigger = {
		ic = 80
		technology = 3320
		NOT = { technology = 3330 }
	}

	name = "EVT_840187_NAME"
	desc = "EVT_840050_DESC"
	picture = "American_carrier"
	style = 0


	action_a = {
		name = "EVT_840050_ACTA"
		command = { type = add_division value = carrier when = 0 where = cag }
	}
}

I even planed to do this for some other ships:

#########################################################################
#  Navaltech - Leichte Kreuzer 7 / 7
#########################################################################
event = {
	id = 840163
	random = no
	invention = yes

	trigger = {
		technology = 12010
		manpower = 10
		supplies = 350
	}

	name = "EVT_840157_NAME"
	desc = "EVT_840050_DESC"
	picture = "American_ships_in_dock"
	style = 0


	action_a = {
		name = "EVT_840050_ACTA"
		command = { type = add_division value = light_cruiser when = 6 where = NAVAL_SA_L }
		command = { type = manpowerpool value = -2 }
		command = { type = supplies value = -100 }
	}
	action_b = {
		name = "EVT_840050_ACTB" # No, we don't need any
		command = { }
	}
	action_c = {
		name = "EVT_840050_ACTC"
		command = { type = add_division value = light_cruiser when = 6 where = NAVAL_SA_L }
		command = { type = add_division value = light_cruiser when = 6 where = NAVAL_SA_L }
		command = { type = add_division value = light_cruiser when = 6 where = NAVAL_SA_L }
		command = { type = manpowerpool value = -6 }
		command = { type = supplies value = -300 }
	}
}

How does it work for them?