Multiple states of the world formed the United Nations (the UN) at the year 1945, after the end of World War II.
The term "United Nations" was first used by Winston Churchill and Franklin D. Roosevelt, in the 1942 Declaration by United Nations, which united the Allied countries of WWII under the Atlantic Charter, and soon became a term widely used to refer to them.
On 25 April 1945, the UN Conference on International Organization began in San Francisco, attended by 50 governments and a number of non-governmental organizations involved in drafting the Charter of the United Nations. The UN officially came into existence on 24 October 1945 upon ratification of the Charter by the five permanent members of the Security Council — France, the Republic of China, the Soviet Union, the United Kingdom and the United States — and by a majority of the other 46 signatories.
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