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.
Seminole Wars
Spain ceded Florida to the United States in 1819 with the Adams–Onís Treaty, and the United States took possession in 1821. Effective government was slow in coming to Florida. General Andrew Jackson was appointed military governor in March 1821, but he did not arrive in Pensacola until July. He resigned the post in September and returned home in October, having spent just three months in Florida. His successor, William P. Duval, was not appointed until April 1822, and he left for an extended visit to his home in Kentucky before the end of the year. Other official positions in the territory had similar turn-over and absences.