East Florida (Spanish: Florida Oriental) was a colony of Great Britain from 1763 to 1783 and a province of the Spanish Empire from 1783 to 1821. The British gained control over Spanish Florida in 1763 as part of the Treaty of Paris that ended the Seven Years' War. Deciding that the colony was too large to administer as a single unit, British officials divided Florida into two colonies separated by the Apalachicola River: the colony of East Florida, with its capital located in St. Augustine; and West Florida, with its capital located in Pensacola. East Florida was much larger and comprised the bulk of the former Spanish colony and most of the current state of Florida. It had also been the most populated region of Spanish Florida, but before control was transferred to Britain, most residents β including virtually everyone in St. Augustine β left the territory, with most migrating to Cuba.
Britain tried to attract settlers to the two Floridas without much success. The sparsely populated colonies were invited to send representatives to the Continental Congress but chose not to do so, and they remained loyal to Great Britain during the American Revolutionary War. However, as part of the 1783 treaty in which Britain officially recognized the independence of thirteen of its former colonies as the United States, it ceded both Floridas back to Spain, which maintained them as separate colonies while moving the boundary east to the Suwannee River.