United Nations, headquartered on international territory in New York City is an organisation whose purposes are to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and be a centre for harmonising the actions of nations.
It is headquartered on international territory in New York City, and has other main offices in Geneva, Nairobi, Vienna, and The Hague (home to the International Court of Justice).
It is the world's largest and most familiar international organization.
The UN officially came into existence on 24 October 1945, after ratification of the UN Charter by the five permanent members of the UNs Security Council.
The UN has six principal organs:
General Assembly; Security Council; Economic and Social Council;
Trusteeship Council; International Court of Justice (The Hague); UN Secretariat.
The UN's mission to preserve world peace was complicated in its early decades by the Cold War between the United States and the Soviet Union and their respective allies.
Although the UN Charter had been written primarily to prevent aggression by one nation against another, in the early 1990s the UN faced a number of simultaneous, serious crises within nations such as Somalia, Haiti, Mozambique, and the former Yugoslavia.
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