convoy mode:
1 EV, 2 APC attacker spawm points in front and behind the EV.
objectve: keep the EV functional to keep the convoy rolling, fix them as quickly as possible once its disabled, reach the destination within a time limit. defenders have to stall them as long as possible by disabling the forward APC or the EV. disabling the rear APC slows the convoy down but doesnt stop it, in addition to placing some enemies further back when they spawn in through it.