You might want to rethink the types of tanks in each platoon . The USA used mostly M4 / M4A1 ( radial engine ) and the M4A3 ( gas V-8 ) . All tanks in the unit should have the same engine for ease of supply and maintenance .That's why the M4A2 ( diesel ) went to the USMC and Lend Lease , and the M4A4 ( Chrysler multi bank 5 x 6 cylinder ) went Lend Lease mostly to the Brits . IRC , the ammo differences didn't cause a problem ( 75mm , 76mm or 105mm ) for the US supply chain . Looks like you have enough tanks to shuffle them about and still fill your platoons . As Pinky said , get the markings for each troop as same as possible ( stars , numbers , etc ) , maybe make the M4 / M4A1 types another unit with a different style star and larger or smaller numbers ( maybe a replacement unit due to heavy losses )