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At the governmental level, relations between Australia and the United States are formalized by the ANZUS and AUKUS treaties and the Australia–United States Free Trade Agreement. They were formally allied together in both World War I, World War II, the Korean War, the Vietnam War, the Gulf War, and the War on Terror, although they had disagreements at the Paris Peace Conference. Australia is a Major non-NATO ally of the United States.
Both the United States and Australia share some common ancestry and history. Both countries had native peoples who were at times dispossessed of their land by the process of colonization, as have all countries at some point in history. Both states have also been part of a Western alliance of states in various wars. Together with three other Anglosphere countries, they comprise the Five Eyes espionage and intelligence alliance.