How do you set up an offensive military airport?

I need an offensive military airport for my invasion defense craft, but I can't seem to find out how to set 1 up, I think I can buy one, but how do I set it up after that? I've been everywhere and can't figure out how to do it. I recently taken over this country but I need an offensive military airport to place more invasion defense forces, and there's not one on the map here in this new country I recently taken over, please explain how to do it. Thanks... a lot, may god have mercy on your soul.

you should be able to purchase one through the international market. The only way (don't quote me) you can't is. If you don't have enough personal/military..Just go to trade and supply like above your country and scroll down until you find offensive airport..I hope this helps

thank you m8. I'll see what I can do, I'll probably place it, also I'm about to start playing Cashtowns after I get these accounts setup, it's cash too but don't quit this