Top left: No idea, but would guess Japanese or Chinese tank, because most other countries were using welding techniques at the time except the Chinese and the Japanese still using rivets. Top right: Chi-Ha Middle: Panzer IV(Ausf D) or at least German. hard to tell because lots of German tanks have similar turrets. Bottom left: no idea at all Bottom right: M3 Lee (they should've parodied AMX-12t just for the name ;P )