Canada in the Korean War with military force. The North hoped that they would be able to unify the peninsula via insurgency, but the success of South Korea (Republic of Korea: ROK) in suppressing insurgency brought about the realization for the North that they would require military force. North Korea (Democratic People's Republic of Korea: DPRK) had expanded their army and Korean volunteers fighting in Manchuria in the Chinese Civil War had given their troops battle experience. The North expected to win with the war in a matter of days. Troops from Kim Il Sung's North Korean Army (KPA) crossed the 38th parallel on 25
Australia in the Korean War border between North Korea and China, and extend their rollback policy into China. Many in the West, including General MacArthur, thought that spreading the war to China would be necessary and that since North Korean troops were being supplied by bases in China, those supply depots should be bombed. However, Truman and the other leaders disagreed, and MacArthur was ordered to be very cautious when approaching the Chinese border. Except on some rare occasions, UN bombers remained out of Manchuria during the war. China warned American leaders through neutral diplomats that it would intervene to protect its national security, however