The T28 Super Heavy Tank was an American heavily armored tank/self-propelled gun designed for the United States Army during World War II. It was originally designed to break through German defenses of the Siegfried Line, and was later considered as a possible participant in the planned invasion of the Japanese mainland. The near 100-ton vehicle was initially designated a heavy tank. It was re-designated as the 105 mm Gun Motor Carriage T95 in 1945, and then renamed in 1946 as the Super Heavy Tank T28. Only two prototypes were built before the project was terminated. Name Initially named Heavy Tank T28 when construction was authorized in 1944, the design did not fit in the usual categories of vehicles leading to reclassification. As it did not have its armament in a revolving turret, Ordnance requested a name change to 105 mm Gun Motor Carriage T95, the change becoming official in March 1945. However, due to its heavy armor and armament—while self-propelled guns in United States service were lightly armored—it was renamed Super Heavy Tank T28 in June 1946 by OCM 37058. Development The T28/T95 was designed to be used for attacking the heavy defenses expected of the Siegfried Line along the western borders of Germany. The 105mm T5E1 gun selected was known to have very good performance against concrete and "expected to be extremely effective at reducing heavy fortifications". By the time the vehicle passed trials, the German Siegfried Line had already been infiltrated and overwhelmed by the Allied forces, so the designers decided to send the T28/T95 tanks to fight on the Japanese mainland later in the war. Japan surrendered before the tank was transported overseas. The need for an assault tank was first identified in 1943, Ordnance proposing that 25 vehicles could be ready for operations. A conference in March 1944 between Ordnance Department and Army Ground Forces resulted in agreement to build five. The Pacific Car and Foundry Company were supplied with the design in March 1945, completed final design and had the first hull welded by August. By the time the first tank was completed and ready for combat, the war was over. The plan for five was reduced to two. As it did not have a turret, but a fixed casemate mount instead for its main armament (as German Jagdpanzers and Soviet Samokhodnaya Ustanovka-designation combat vehicles did), and the 105 mm gun fitted could only elevate