Units disappearing

I just built an entire strategic carrier group and as soon as I declared war on a player it disappeared. All weapons and ammunition gone as well as one of my bombing wings. PLEASE HELP OR FIX THIS. The carrier group was docked at base and had never been moved. Trillions disappeared. Country name: Sparta

Units do not disappear.
They can dismantle if they are short of ammunition and you do not fix it.

When they dismantle, weapons and ammunition return to the country stock.

Make sure you have large quantities of all types of ammunitions your military units need.
Never build a unit if you do not have all the ammunitions needed.

We get message on the processing logs in units are dismantles for lack of ammunition.

recently, we see more such messages.

When units get dismantled because of lack of ammunition, most of the equipment ist lost.
I had set up 1 unit with 1000 Mid Range Batteries and 971 Offensive AA Batteries and after it got dismantled, i was left with only 19 Off AA Batteries.
Best is to Buy lots of Ammo first and then set up the units

If you have units with no supplies, they will disband to its particular country going into reserves with no losses.

However, if you have weapons sitting in stock and no ammo for a long enough period they will start being destroyed.

With the exception of maybe nuclear defense missiles and some of the Navy defense, if I'm below 5M in stock I force orders. If you are not a premium account and can't buy at other than best price you better have your low water marks set high.