<Tr> <Td_colspan="2"> Today part of </Td> <Td> United States <Ul> <Li> Florida </Li> </Ul> </Td> </Tr> <Ul> <Li> Florida </Li> </Ul> <P> The Territory of Florida was an organized incorporated territory of the United States that existed from March 30, 1822, until March 3, 1845, when it was admitted to the Union as the State of Florida . Originally the Spanish territory of La Florida, and later the provinces of East and West Florida, it was ceded to the United States as part of the 1819 Adams--Onís Treaty . It was governed by the Florida Territorial Council . </P> <P> Florida was first discovered in 1513 by Juan Ponce de León who claimed the land as a possession of Spain . St. Augustine, the oldest continually inhabited European settlement in the continental U.S., was founded on the northeast coast of Florida in 1565 . Florida continued to remain a Spanish possession until the end of the Seven Years' War when Spain ceded it to the Kingdom of Great Britain in exchange for the release of Havana . In 1783, after the American Revolution, Great Britain ceded Florida back to Spain . </P>

How did florida become a possession of the united states