Florida
Florida had become a burden to Spain, which could not afford to send settlers or garrisons. Madrid therefore decided to cede the territory to the United States through the Adams–Onís Treaty, which took effect in 1821. President James Monroe was authorized on March 3, 1821 to take possession of East Florida and West Florida for the United States and provide for initial governance. Andrew Jackson, on behalf of the U.S. federal government, served as a military commissioner with the powers of governor of the newly acquired territory for a brief period. On March 30, 1822, the U.S. Congress merged East Florida and part of West Florida into the Florida Territory.
By the early 1800s, Indian removal was a significant issue throughout the southeastern U.S. and also in Florida. In 1830, the U.S. Congress passed the Indian Removal Act and as settlement increased, pressure grew on the U.S. government to remove the Indians from Florida. Seminoles offered sanctuary to blacks, and these became known as the Black Seminoles, and clashes between whites and Indians grew with the influx of new settlers. In 1832, the Treaty of Payne's Landing promised to the Seminoles lands west of the Mississippi River if they agreed to leave Florida. Many Seminole left at this time.
History of Hispanic and Latino Americans in the United States
The area of Spanish Florida diminished with the establishment of English colonies to the north and French colonies to the west. The English weakened Spanish power in the area by supplying their Creek Indian allies with firearms and urging them to raid the Timucuan and Apalachee client-tribes of the Spanish. The English attacked St. Augustine, burning the city and its cathedral to the ground several times, while the citizens hid behind the walls of the Castillo de San Marcos. The Spanish, meanwhile, encouraged slaves to flee the English-held Carolinas and come to Florida, where they were converted to Roman Catholicism and given freedom. They settled in a buffer community north of St. Augustine, called Gracia Real de Santa Teresa de Mose, the first completely black settlement in what would become the United States. Great Britain gained control of Florida diplomatically in 1763 through the Peace of Paris (the Castillo de San Marcos surrendered for the first time, having never been taken militarily). Britain tried to develop Florida through the importation of immigrants for labor, including some from Menorca and Greece, but this project ultimately failed. Spain regained Florida in the Treaty of Versailles (1783) after helping defeat Britain in the American Revolutionary War. Finally, in 1819, by terms of the Adams–Onís Treaty, Spain ceded Florida to the United States in exchange for the American renunciation of any claims on Texas. On March 3, 1845, Florida became the 27th state of the United States of America.