Strategic carrier group dissapears. (again)

Somebody please for the love of god tell me why the f*** my units disappear after i create them. Just wasted 1T on a strategic carrier group for it to vanish a second time. "weapons bruh and stuff bro" no that's bulls***. give me an exact guide and answers. Tell me exactly the mechanics behind this and why its in the game. You already buy navy maintenance, gasoline, supplies and supply boats. what threshold needs to be maintained for this not to happen? how much stuff is consumed per month that causes this to happen? My Navy was in port (base) AND HAS NEVER LEFT so what is the issue here?? I met all minimum requirements for weapons and ammo before its creation. Make an indicator or some info on unit consumption or something please!!!

go through your newspaper. go through every single month til you find the message that tells you why the unit was dismantled.

if it runs out of ammo, of any kind, the unit is dismantled and the weapons are put back into your stockpile. they never randomly dismantle on their own.

Did you have supply units?