United States annexes the former Spanish colony of West Florida.

West Florida was a region on the northern coast of the Gulf of Mexico that underwent several boundary and sovereignty changes during its history. Great Britain established West and East Florida in 1763 out of land acquired from France and Spain after the Seven Years' War. As its name suggests, it was formed out of the western part of former Spanish Florida, along with land taken from French Louisiana. Pensacola became West Florida's capital. The colony included about two thirds of what is now the Florida panhandle, as well as parts of the modern U.S. states of Louisiana, Mississippi, and Alabama.