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.
West Florida
On October 27, 1810, U.S. President James Madison proclaimed that the United States should take possession of West Florida between the Mississippi and Perdido Rivers, based on a tenuous claim that it was part of the Louisiana Purchase. (See "The U.S. claim", below.) The West Florida government opposed annexation, preferring to negotiate terms to join the Union. Governor Fulwar Skipwith proclaimed that he and his men would "surround the Flag-Staff and die in its defense". William C. C. Claiborne was sent to take possession of the territory, entering the capital of St. Francisville with his forces on December 6, 1810, and Baton Rouge on December 10, 1810. Claiborne refused to recognize the legitimacy of the West Florida government, however, and Skipwith and the legislature eventually agreed to accept Madison's proclamation. Congress passed a joint resolution, approved January 15, 1811, to provide for the temporary occupation of the disputed territory and declaring that the territory should remain subject to future negotiation.