Here is the use of IFV: When a engineer is in it, it can repair other vehicles for FREE When a GI is in it, it has a small turret When a Chrono Legionnaire is in it, it has a small turret which shoots the thing chrono legionnaire shoots When a Yuri is in it, it use a circle of the purple color thing to attack When a Tanya or Psi commander is in it, it fires gun which Tanya uses When a terrorist or crazy ivan is in it, guess what, it becomes a suicide tank, something like demo truck =)