The Treaty of Paris, 1763, ended the Seven Years' War and terms were such that 'France surrendered to Great Britain the remainder of Louisiana to the east of the Mississippiand all of Canada. In the same treaty, England also acquired Florida from Spain.' ¹ As such, 'Spain gained complete control over the mouth of the Mississippi.' ²

1. Weber, David J., The Spanish Frontier in North America, Yale University Press, New Haven, 1992, 199.

2. Hemphill, W. Edwin, 'The Jeffersonian Background of the Louisiana Purchase,' The Mississippi Valley Historical Review, September 1935, Volume 22, Issue 2 177-190, 177.