Florida Territory
Beginning in late 1835, Osceola and the Seminole allies began a guerrilla war against the U.S. forces. Numerous generals fought and failed, succumbing to the heat and disease as well as lack of knowledge of the land. It was not until General Thomas Jesup captured many of the key Seminole chiefs, including Osceola who died in captivity of illness, that the battles began to die down. The Seminoles were eventually forced to migrate. Florida joined the Union as the 27th state on March 3, 1845. By this time, almost all of the Seminoles were gone, except for a small group living in the Everglades.
History of St. Augustine, Florida
Florida was ceded to the United States by Spain in the 1819 Adams–Onís Treaty, ratified in 1821; Florida officially became a U.S. possession as the Florida Territory in 1822. Andrew Jackson, a future president, was appointed its military governor and then succeeded by William Pope Duval, who was appointed territorial governor in April 1822. Florida gained statehood in 1845.