Talk:World 1/@comment-24409121-20150120041235/@comment-106.68.45.188-20150120043154

AS = air superiority

AS+ = air supremacy

If you want AS you have to get Air Power (AP) higher than that number beside AS and if you want AS+ you have to get AP higher than the number beside AS+

I believe AS and AS+ determines enemy bomber damage, allied bomber damage and the ability to use artillery spotting.

you can sort of read under Fighter Combat under Combat in Battle Mechanics

Hope this helps :P