What about AI bomber formations to simulate new bombers being delivered to major fields? The flights start off map somewhere and fly to large and maybe medium airfields, where they land and taxi to a hangar revetment and shut down. They stay parked there until destroyed by bombing or strafing - they behave like regular targets by breaking and burning for a few minutes, then after the fire goes out they disappear.
Could have a single bomber or transport escorted by a few AI fighters fly between behind-the-lines fields that simulate visits by top brass. If you catch and shot down these bombers, the country loses ENY or some similar penalty to reflect a drop in morale from the loss of a top leader.
Could also have AI C-47 convoys for field resupply. Work the same along the same lines as truck convoys but they are C-47s instead.
Just thinking of ways to give people other types of missions to add more variety to the game. Might break up the hordes somewhat if people choose to do sweeps behind enemy lines.
