Tanks of the United States US allies it was also used in conflicts beyond World War II. A 24-volt electrical system was used in the M4. Early Shermans mounted a 75 mm medium-velocity general-purpose gun. Although Ordnance began work on the Medium Tank T20 as a Sherman replacement, ultimately the Army decided to minimize production disruption by incorporating elements of other tank designs into the Sherman. Later M4A1, M4A2, and M4A3 models received the larger T23 turret with a high-velocity 76 mm M1 gun, which reduced the number of HE and smoke rounds carried and increased the number of anti-tank rounds. Later, the M4 and
Tanks of the U.S. in the Cold War its derivative M46 Patton were credited with almost half of the North Korean T-34s destroyed by US tanks. Being underpowered and unreliable in the mountainous Korean terrain, all Pershings were withdrawn from Korea in 1951, and replaced with M4 Shermans and M46 Pattons. The M103 was manufactured at the Detroit Arsenal Tank Plant and the first units were accepted in 1957. The M103 was designed to counter Soviet heavies. Its long-ranged 120 mm cannon was designed to hit enemy tanks at extreme distances, but it was never used in combat. Of the 300 M103s built, most went to the Marines.