Britain gained control of Florida in 1763 in exchange for Havana, Cuba, which the British had captured from Spain during the Seven Years’ War (1756–63). Spain evacuated Florida after the exchange, leaving the province virtually empty. At that time, St. Augustine was still a garrison community with fewer than five hundred houses, and Pensacola also was a small military town.
The British had ambitious plans for Florida. First, it was split into two parts: East Florida, with its capital at St. Augustine; and West Florida, with its seat at Pensacola.
The two Floridas remained loyal to Great Britain throughout the War for American Independence (1776–83). However, Spain—participating indirectly in the war as an ally of France—captured Pensacola from the British in 1781. In 1784 it regained control of the rest of Florida as part of the peace treaty that ended the American Revolution.
When the British evacuated Florida, Spanish colonists as well as settlers from the newly formed United States came pouring in. Many of the new residents were lured by favorable Spanish terms for acquiring property, called land grants. Others who came were escaped slaves, trying to reach a place where their U.S. masters had no authority and effectively could not reach them. Instead of becoming more Spanish, the two Floridas increasingly became more "American." Finally, after several official and unofficial U.S. military expeditions into the territory, Spain formally ceded Florida to the United States in 1821, according to terms of the Adams-Onís Treaty.
Andrew Jackson returned to Florida in 1821 to establish a new territorial government on behalf of the United States. What the U.S. inherited was a wilderness sparsely dotted with settlements of native Indian people, African Americans, and Spaniards.
As a territory of the United States, Florida was particularly attractive to people from the older Southern plantation areas of Virginia, the Carolinas, and Georgia, who arrived in considerable numbers. After territorial status was granted, the two Floridas were merged into one entity with a new capital city in Tallahassee. Established in 1824, Tallahassee was chosen because it was halfway between the existing governmental centers of St. Augustine and Pensacola.
- Florida Cultural, Historical and Information Programs “A Brief History of Florida: From the Stone Age to the Space Age”