Maritime history of Florida
Spain ceded Florida to the United States as part of the Adams–Onís Treaty of 1819, and Florida became a U.S. territory in 1821. Coastal trade with other markets continued to expand and towns like Jacksonville, Pensacola and Tampa became important ports. After becoming a U.S. territory, the federal government began building a series of lighthouses as aids to navigation along the coasts of Florida to mark dangerous headlands, shoals, bars and reefs.
History of Mississippi
Americans had continuing land disputes with the Spanish, even after taking control of much of this territory through the Louisiana Purchase (1803) from France. In 1810 the European-American settlers in parts of West Florida rebelled and declared their freedom from Spain. President James Madison declared that the region between the Mississippi and Perdido rivers, which included most of West Florida, had already become part of the United States under the terms of the Louisiana Purchase. The section of West Florida between the Pearl and Perdido rivers, known as the District of Mobile, was annexed to Mississippi Territory in 1812; Americans from the United States occupied Kiln, Mississippi, in 1813.