On 25 June 1950, the United Nations Security Council unanimously condemned the North Korean invasion of South Korea, with UN Security Council Resolution 82. The Soviet Union, a veto-wielding power, had boycotted the Council meetings since January 1950, protesting Taiwan's occupation of China's permanent seat in the UN Security Council. After debating the matter, the Security Council, on 27 June 1950, published Resolution 83 recommending member states provide military assistance to the Republic of Korea. On 27 June President Truman ordered US air and sea forces to help South Korea.

The United Nations Security Council Resolution 84 was adopted on July 7, 1950. Having determined that the invasion of South Korea by forces from North Korea constituted a breach of the peace, the Council recommended that the members of the United Nations furnish such assistance to the South Korean state as may be necessary to repel the attack and restore peace and security to the area. The Council further recommended that all members providing military forces and other assistance to The Republic make these forces and assistance available to a unified command under the United States of America.