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 Florida
Following Abraham Lincoln's election in 1860, Florida joined other Southern states in seceding from the Union. Secession took place January 10, 1861, and, after less than a month as an independent republic, Florida became one of the founding members of the Confederate States of America. As Florida was an important supply route for the Confederate Army, Union forces operated a blockade around the entire state. Union troops occupied major ports such as Cedar Key, Jacksonville, Key West, and Pensacola. Though numerous skirmishes occurred in Florida, including the Battle of Natural Bridge, the Battle of Marianna and the Battle of Gainesville, the only major battle was the Battle of Olustee near Lake City.