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Armored warfare

The initial assault by KPA forces was aided by the use of Soviet T-34-85 tanks. A KPA tank corps equipped with about 120 T-34s spearheaded the invasion. These faced an ROK that had few anti-tank weapons adequate to deal with the T-34s. Additional Soviet armor was added as the offensive progressed. The KPA tanks had a good deal of early successes against ROK infantry, Task Force Smith, and the U.S. M24 Chaffee light tanks that they encountered. Interdiction by ground attack aircraft was the only means of slowing the advancing KPA armor. The tide turned in favor of the UN forces in August 1950 when the KPA suffered major tank losses during a series of battles in which the UN forces brought heavier equipment to bear, including American M4A3 Sherman and M26 medium tanks, alongside British Centurion, Churchill and Cromwell tanks.

The Incheon landings on 15 September cut off the KPA supply lines, causing their armored forces and infantry to run out of fuel, ammunition, and other supplies. As a result of this and the Pusan perimeter breakout, the KPA had to retreat, and many of the T-34s and heavy weapons had to be abandoned. By the time the KPA withdrew from the South, 239 T-34s and 74 SU-76 self-propelled guns were lost. After November 1950, KPA armor was rarely encountered.

Following the initial assault by the North, the Korean War saw limited use of tanks and featured no large-scale tank battles. The mountainous, forested terrain, especially in the eastern central zone, was poor tank country, limiting their mobility. Through the last two years of the war in Korea, UN tanks served largely as infantry support and mobile artillery pieces.