The World War II ended and the world needed peace. Most of the leaders agreed to work together for this aim. That is why the United Nations was established. However, immediately after the war, the United States and the USSR are confronted about various important issues. The Cold War begins - the time of armament, competition and constant insecurity. The poor African and Asian countries are launching a process of decolonization, seeking sovereignty for their countries. The leader of this movement was India, and its neighboring Asian state. Then, the process spreads to Africa. Asian and African countries are beginning to meet and in time launch Non-Aligned Movement. Naser, Nehru and Tito had a major role in this. With NonAligned Movement, African and Asian countries gain importance on the diplomatic scene. Accordingly, great powers struggle for strategic points and many conflicts come to light. The toughest is happening in Asia and Africa. A big conflict happened between the Jews and Arabs in the Middle East. At the same time there are big figts on the Korean and Indochinese peninsula. Great powers were involved in all three conflicts, and some of them had even start them.