Washington Treaty

Treaty of Washington, 1836, a U.S.-Native American treaty
The Treaty of Washington of 1871, a general agreement between the United States and the British Empire
The International Meridian Conference of 1884 in Washington DC, establishing the Greenwich Meridian, the world time zone system and the universal day as international standards
The Washington Naval Treaty of 1922 that limited naval armaments
The North Atlantic Treaty of 1949 that created NATO

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