Korean War has since been patrolled by the KPA and ROKA, United States, and Joint UN Commands. The Demilitarized Zone runs northeast of the 38th parallel; to the south, it travels west. The old Korean capital city of Kaesong, site of the armistice negotiations, originally was in pre-war South Korea, but now is part of North Korea. The United Nations Command, supported by the United States, the North Korean People's Army, and the Chinese People's Volunteers, signed the Armistice Agreement on 27 July 1953 to end the fighting. The Armistice also called upon the governments of South Korea, North Korea, China and
Australia in the Korean War where they became the first UN air unit to enter the war, primarily in ground support, combat air patrol, and escort missions. 3 RAR was rapidly committed as Australia's main land force contribution to the United Nations forces in the Korean War. After a period of intensive training and reinforcement in Japan, the battalion arrived in South Korea in late September 1950. The battalion formed part of the 27th Commonwealth Brigade and took part in the United Nations offensive into North Korea and the subsequent retreat into South Korea following the Chinese offensive in the winter of 1950–51. It was