French Louisiana French Louisiana The term French Louisiana refers to two distinct regions: Each term has been in use for many years. Colonial French Louisiana was a part of New France. Beginning in 1682 this region, known in French as "la Louisiane française", functioned as an administrative district of New France. It extended from the Gulf of Mexico to Vincennes, now in Indiana. France ceded the region to Spain and Britain in 1763 after the French and Indian War, regained it by treaty in 1800, and sold it to the United States in 1803 through the Louisiana Purchase. Greater New Orleans and
Convention of 1800 This led to the Quasi-War of 1798–1800; largely dismantled after independence, the US Navy was quickly re-established and gained the upper hand, with limited support from the British Royal Navy. Despite this, President John Adams continued to seek a diplomatic solution; in addition to the cost of the Quasi-War, the US was increasingly concerned by French ambitions in North America. France ceded Louisiana-New Spain to Spain by the 1763 Treaty of Paris; combined with Spanish Florida, Spain controlled the Mississippi River basin (see Map), effectively blocking US expansion to the South and West. Efforts to manage this through diplomacy, including