In 'War in Mid Air' the teams are split between attackers and defenders. The task of the attacking aircraft team is to destroy any tanks that are positioned inside the city, as well as any anti-air player vehicles. The task of the defending anti-aircraft vehicles is to stop the rout from happening and hold the position in the city until the attacker has bled all his tickets or lost all aircraft.
Tickets for the attacking team will reduce up to the point when all the city ground vehicles have been destroyed. If the aviation succeed in their task, the ticket bleed stops and the the task will switch to destroying the remaining, player controlled anti-air vehicles.