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.
Territorial evolution of North America since 1763
Illinois Territory was split from Indiana Territory. Illinois Territory included present-day Illinois, northeastern Minnesota, and Wisconsin. Indiana Territory included the present-day borders of Indiana, with its western and eastern borders continuing northward; thus, it also included the central portion of the upper peninsula of Michigan, as well as Door Peninsula of present-day Wisconsin.
The short-lived Republic of West Florida declared its independence from Spain.
US President James Madison proclaimed the annexation of the Baton Rouge and Mobile Districts of West Florida, declaring them part of the Louisiana Purchase. The US Army occupied the capital, St. Francisville, on December 6 and Baton Rouge on December 10, bringing an end to the Republic of West Florida after 90 days.