United States territorial acquisitions
West Florida was declared to be a U.S. possession in 1810 by President James Madison after the territory had declared its independence from Spain. Madison ordered the U.S. Army to take control. Six weeks later, the army entered and occupied the capital, St. Francisville, putting an end to the republic after 74 days of independence. Spain did not relinquish its claim to sovereignty (see West Florida Controversy) until ratification of the Adams–Onís Treaty. General Andrew Jackson personally accepted the delivery of West Florida from its Spanish governor on July 17, 1821.
Indigenous people of the Everglades region
In 1817, Andrew Jackson invaded Florida to hasten its annexation to the United States in what became the First Seminole War. After Florida became a U.S. territory and settlement increased, conflicts between colonists and Seminoles became more frequent. The Second Seminole War (1835–1842) resulted in almost 4,000 Seminoles in Florida being displaced or killed. The Seminole Wars pushed the Indians farther south and into the Everglades. Those who did not find refuge in the Everglades were relocated to Oklahoma Indian territory under Indian Removal.