Summit Conference of Heads of State or Government of the Non-Aligned Movement on 1–6 September 1961 in Belgrade, Yugoslavia was the first conference of the Non-Aligned Movement. A major contributing factor to the organization of the conference was the process of decolonization in a number of African countries in the 1960s. Some therefore called it the "Third World's Yalta" in reference to 1945 Yalta Conference.