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
Soviet Union in the Korean War Soviet military aid was instrumental to equipping both the North Korean and Chinese forces fighting in Korea. The Soviet PPSh-41 submachine gun (nicknamed by US forces the ""Burp Gun"" after the sound it made) was widely supplied to both countries' armies, as was the T-34/85 medium tank which was of great importance during the initial offensives by the Communist side when no US armour (particularly the M24 Chaffee light tank) or anti-tank rockets (such as the M9 2.36-inch Bazooka) could penetrate its heavy sloped armour. Soviet material aid was also fundamental for the air forces of both North Korea and