The anti-air or air defence, which is located in the rear hills of the base station, serves on the one hand to protect units parked in front of the base, and on the other hand mainly to protect air units during base attacks.
Destruction of the Anti Air
The Anti Air can be attacked and destroyed by the enemy. It is as heavily armoured as about 12.5 SAM with wall. If the Anti Air was destroyed, it can be rebuilt against 1 million steel and 1 million carbon each - of course if the base was not taken.
Anti Air Combat Radius
The following drawing shows approximately the radius of the Anti Air. The subscription is not binding. You have to find out the exact radius yourself through play and experience.
Note: the Anti Air shoots backwards only to a very limited extent.