The United States acquired Florida from Madrid in exchange for settling a boundary dispute through what treaty?
Legislative Council of the Territory of Florida:  The territory of Florida was acquired by the U.S. in 1821 under the Adams–Onís Treaty. Adams–Onís Treaty:  Madrid decided to cede the territory to the United States through the Adams–Onís Treaty in exchange for settling the boundary dispute along the Sabine River in Spanish Texas.
Adams–Onís Treaty