Theory of peace in socialist camp in the early years of the Cold War divided the world into two parts. The one is the group for peace led by the Soviet Union, and the other is the group of warmongers led by the United States. European socialists insisted that only the group of warmongers could be the reason of the outbreaks of all kinds of wars. This kind of Antiwar Pacifism was totally different with the theory of the National Liberation War in East Asia in the early years of the Cold War. Most communists in East Asia including Mao Tse-tung, the leader of the Communist China, considered war as essential one to accomplish the goal of national liberation and revolution in their countries. In the early days of the Korean War, Kim Il-sung, the leader of North Korea,also regarded his war as the National Liberation War. However, as the war changed into international war, Kim Il-sung started to understand the character of the Korean War according to the Two Camps theory of the Soviet Union. He regarded the Korean War as the conflict between the group for peace and the group of warmongers. This kind of perception of the Korean War, however,completely disappeared in late 1960s when North Korean government started to strengthen it’s dictatorship and self-reliance in diplomacy.