(1) The Outbreak of the War			(5) China's Entry into War
		(2) Participating UN Forces			(6) The Retreat of UN Forces
		(3) The Incheon Landing			(7) The Dismissal of MacArthur
		(4) Korea's Unification and Crossing the 38th Parallel			(8) Establishing Armistice

Participating UN Forces

North Korea invaded the South at the dawn of June 25,1950 along the 38th parallel. The US convened an emergency session at the United Nations Security Council on the 25th at the news of war. The council declared that North Korea's act was an "invasion" threatening peace. It also declared that North Korea should end its offences and withdraw its forces north of the 38th parallel. It also asked UN member states for aid for the UN and for suspension of any aid to North Korea. The UN demand was ignored by the North Koreans and the war continued. On June 27, US President Truman ordered the US Navy and Air Force to support the South Korean Army. On the same day, the UN Security Council recommended that member states provide aid to South Korea in order to block North Korea's attack and restore international peace and security on the Korean peninsula. Later, the UN approved of US's military action.

On June 28, General MacArthur who was in charge of the US Army in the Far East came to Korea from Tokyo to look around the battle line. General MacArthur asked for ground forces to the US Department of Defense. On July 7, the UN Security Council adopted a resolution that gives the right to command the UN forces in Korea to the US. General MacArthur was named the commander in chief of the United Nations Command and the UN forces were to be dispatched. The authority to command operations in Korea was given to General MacArthur and the army, navy and air force from 16 nations were under the command of General MacArthur. South Korean President Lee Seungman signed a war memorandum on July 14 that gave the right to command the South Korean forces to General MacArthur.