Borderlands scholars who have studied Spanish policy toward the Indian tribes of North America have remarked on the notable difference between the mission- presidio system of the “New Southwest” and the trading-post techniques of the “Old Southwest.” In the area stretching from Memphis on the north to the Gulf of Mexico on the south, and from the Mississippi River to St. Augustine on the Atlantic coast, Spain followed the successful patterns established first by the French until 1763, and thereafter by the British in West Florida until the close of the American Revolution.
Holmes, Jack D. L.
"Juan de la Villebeuvre and Spanish Indian Policy in West Florida, 1784-1797,"
Florida Historical Quarterly: Vol. 58
, Article 4.
Available at: https://stars.library.ucf.edu/fhq/vol58/iss4/4