United States territorial acquisitions
West Florida was declared to be a U.S. possession in 1810 by President James Madison after the territory had declared its independence from Spain. Madison ordered the U.S. Army to take control. Six weeks later, the army entered and occupied the capital, St. Francisville, putting an end to the republic after 74 days of independence. Spain did not relinquish its claim to sovereignty (see West Florida Controversy) until ratification of the Adams–Onís Treaty. General Andrew Jackson personally accepted the delivery of West Florida from its Spanish governor on July 17, 1821.
Dominion of British West Florida
The Dominion of British West Florida is a separatist micronation founded in 2005 "on an eccentric interpretation of actual historic events" and based in the Gulf coast region of the United States. It claims the territory of the 18th-century colony of West Florida, which has since been subsumed into the US states of Alabama, Louisiana, and Mississippi.