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On 9 July 1816, the Congress declared the independence of Argentina. https://en.wikipedia.org/wiki/Timeline_of_Argentine_history
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Constitution of Argentina agreed by in Santa Fe making a modern system of government.
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Start of War of the Triple Alliance between Paraguay and the Triple Alliance of Argentina, Brazil and Uruguay
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Gold is discovered near Cape Virgenes provoking Tierra del Fuego gold rush.
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The government declared mandatory military.
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Argentina enters World War II on the side of the Allies and was a founding member of United Nations.
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Che Guevera died in 1967 from extenuation.
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Death of Juan Perón, leaving widow Isabel Martínez de Perón as president.
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Military government collapsed; election of Radical Raúl Alfonsín as president.
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The Treaty of Peace and Friendship of 1984 between Chile and Argentina ends border dispute over Picton, Nueva and Lennox islands.