What territory did Andrew Jackson invade and conquer?

Andrew Jackson invaded and conquered Florida during the First Seminole War in 1818. He led U.S. troops into Spanish-held Florida, targeting Seminole tribes and escaping slaves. His military actions ultimately pressured Spain to cede Florida to the United States, formalized by the Adams-Onís Treaty in 1819. Jackson's campaign played a significant role in expanding U.S. territory.