I think it would be a good idea to be able to commandeer enemy vehicles, when this happens your axis or allied flag could be draped over the front or rear of the vehicle, or a cross or star be painted on the sides like in rl.
OB3R
OB3R
captured vehicles were used in combat, but those were captured after a battle, had crews train with them and THEN after beeing repainted/refitted/upgraded whatever got sendt to the front
something like: hey there's a russian tank, lets hop in and kill some russians didnt happen
period
and captured T34's are easily modable, and have been done in Ostfront
Being able to use captured tanks is a no no, I'm not sure about other vehicles though.