When the Korean War broke out, the North Korean army set about 240 Soviet-made T-34-85 tanks at the head. This tank served as the main battle tank for the Soviet military during World War II. It became the terror of the ROK Armed Forces when the Korean War broke out, as there were no countermeasures. However, it quickly lost its prestige due to the U.S. Air Force's air support and the operation of tank units.