The self-propelled weapon GMC M12 was utilized during the Second World War by the U.S. Army. It was developed regarding hull associated with M3 Lee / give tank where had been installed the original French GPF 155 mm weapon. The primary armament, the ammunitions therefore the weapon crew were based in an open topped area at the back of the vehicle. Only the driver's as well as the radio operator’s seats were protected. To soak up the results for the recoil while using the artillery piece, the M-12 ended up being equipped with a rear blade that has been lowered and fixed into the ground.