In the year 1945, the international organization formed to maintain harmony in the world was the United Nations.
The international organization is an entity established by signing a treaty between various countries across the world.
United Nations was created as an international organization after the end of World War II with the involvement of fifty-one countries around the world. It was formed to maintain global peace, initiation of good relations between countries, and encouragement of the growth of society, better living standards for people, and basic human rights for all.
Therefore, the United Nations was the international organization that was formed to maintain world peace.
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