the M3 Lee was an american medium tank, armed with a 75mm sponson-mounted main gun, a 37mm turreted secondary gun, and multiple machine guns. this tank was designed after the american army realised it needed a better gun than their current 37mm gun, and decided on a 75mm gun, however, due to much higher recoil, they didnt have any turret capable of mounting it. to get a tank into service with a 75mm main gun untill a turret capable of housing one was created, they decided to make a tank with a sponson mounted one. the 37mm turret cannon was also added to be able to deal with light tanks from any angle if necesary.
this tank is gunless as-is but does have internal hovers already added to it. you can mount any weapon you want but i advice disintregrators for good firepower at all ranges and against any target.