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.
Lakeland, Florida
Florida became a state in 1845, and Polk County was established in 1861. After the American Civil War, the county seat was established southeast of Lakeland in Bartow. While most of Polk County's early history centered on the two cities of Bartow and Fort Meade, eventually, people entered the areas in northern Polk County and began settling in the areas which became Lakeland.