When was founded the UNO?

October 24, 1945, San Francisco, California, United States. On October 24, 1945, the U. N. Charter came into force upon its ratification by the five permanent members of the Security Council and a majority of other signatories. The first U. N. General Assembly, with 51 nations represented, opened in London on January 10, 1946

United Nations organisation is a worldwide organisation in which the problems of member nations are solved in a peaceful manner. It was founded in 1945. Reasons for formation of UNO; ... These small war can convert into participation of powerful Nation which can cause a world war.

Maintain International Peace and Security

The United Nations came into being in 1945, following the devastation of the Second World War, with one central mission: the maintenance of international peace and security ... The UN Security Council has the primary responsibility for international peace and security