Following Spain's losses to Great Britain during the Seven Years' War, Spain ceded its Florida territory to Britain in 1763. British administrators then divided the territory into two colonies: East Florida, including the Florida peninsula with the capital at St. Augustine, and West Florida, to which was appended part of the territory received from France under the 1763 peace treaty. West Florida extended from the Apalachicola River to the Mississippi River, with its capital at Pensacola.[4]