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Via the Third Treaty of San Ildefonso, Spain cedes Louisiana to France, which would sell the land to the United States thirty months later.
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Third Treaty of San Ildefonso
1800 treaty between France and Spain involving the colonial territory of Louisiana
The Third Treaty of San Ildefonso was a secret agreement signed on 1 October 1800 between Spain and the French Republic by which Spain agreed in principle to exchange its North American colony of Louisiana for territories in Tuscany. The terms were later confirmed by the March…Source: Wikipedia (CC BY-SA)
Louisiana Purchase
1803 acquisition of region of Middle America land by the U.S. from France
The Louisiana Purchase was the acquisition of the territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Mississippi River's drainage basin west of the river. In return for fifteen million dollars, or…Source: Wikipedia (CC BY-SA)