The M4 Sherman was deployed with US forces from 1942 onwards and was the main American battle tank during the Second World War. The name Sherman came from American Civil War general William Tecumseh Sherman. While performance of the M4 was lacking compared to the tanks fielded by Germany and the Soviet Union in the Second World War, its high reliability made it the most highly produced of the WWII tanks.
The M4A3E8 tank was a version of the M4 Sherman with improved firepower and defensive capabilities, and was deployed with American forces from 1944 onwards. The M4A3E8 was the first US tank to arrive in Korea during the Korean War. M4A3E8 tanks were deployed urgently to the Nakdonggang River Front to fight North Korean T34 tanks. The Korean Armed Forces acquired M4A3E8 tanks through US military aid during the Korean War, and the first units were fielded by the Marine Corps. Later M4A3E8 units were operated by the Army, and the Korean Armed Forces operated a total of more than 300 M4A3E8 Shermans. With the introduction of the M47 tanks to Korean units in the early 1970s, M4A3E8 Shermans were gradually retired from the front lines.