M2A1 Medium TankThe M2A1 Medium Tank represents the final evolution of America's pre war medium tank design. An improved version of the M2 Medium Tank, the M2A1 incorporated valuable lessons learned during the early stages of World War II, though it arrived just as the M3 Medium was entering production. Historical Significance: Last of the M2 Medium Tank family before the M3 Lee Grant series Featured improved armor layout and revised turret design Limited production