Win a war

i read in the explanation that to win the war against a c3 country you have to destroy first the interceptor wing, "there is one" it says, but actually i see that there are a lot... and it's a bit more difficult...
am i wrong?

You have to get the enemy country war index to 0. This can be done by capturing territory, destroying corporations, destroying population (cities, capital, towns, counties), and destroying assets. The most cost effective way to defeat C3s at the moment is to ignore interceptors and focus on the helicopters instead. You need to have a few divisions made up of offensive anti aircraft missile batteries, a few divisions of mid range missile batteries, and a few divisions of heavy tanks. Use the offensive anti air batteries to destroy the enemy defense helicopter wings. When those are done, you can start rolling tanks into their country to capture territory. When you are stopped at a target, attack defenses with the mid range missile batteries, and then attack target with the tanks. Take out the capital, the cities, and the corporations and capture enough territory to reach the maximum war index reduction of 25 and you should have a win. Let me know if you need any more explanation.

Thank you very much, lets see what i can do...

i win the war, ut i have another question, why my air forces are empty? i mean i have 0 soldiers and 0 officers in a lot of them, i'm not understanding very well the functioning of the army... it's pretty complicated

They likely have taken damage. If you have supply units they will replace them with fresh aircraft from your airbases if you have them in stock. You can see if you have them in stock from your offensive/defensive weapons screen. You can also just disband the units and reform them later if you don't have anything to replace them with.

I have supply units but It seems they dont replace anything.
another thing, It seems i miss helicopters and planes but when i Place an order to buy them the order goes lost... I mean the order disappears and the items are not bought, why?

If you don't have ammo for the units, they get destroyed and converted into ammo to pay for training costs. That is a possibility.

Another possibility is that they are being purchased and moved into units by the supply units but you aren't noticing it.

Orders should not disappear.

too complicated ahahah