Adams–Onís Treaty

Treaty ceding Spanish Florida to the U.S. (1819)

The Adams–Onís Treaty was an agreement between Spain and the United States, signed February 22, 1819, by John Quincy Adams and Luis de Onís respectively. The United States acquired Florida while renouncing claims to Spanish Texas and establishing its first transcontinental boundary. The provisions of the treaty remained in full effect only until August 24, 1821, when the Treaty of Córdoba acknowledged Mexican independence from Spain.

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