who established the first european base in mississippi in 1699
Mississippi In April 1699, French colonists established the first European settlement at Fort Maurepas (also known as Old Biloxi), built in the vicinity of present-day Ocean Springs on the Gulf Coast. It was settled by Pierre Le Moyne d'Iberville. In 1716, the French founded Natchez on the Mississippi River (as Fort Rosalie); it became the dominant town and trading post of the area. The French called the greater territory "New France"; the Spanish continued to claim part of the Gulf coast area (east of Mobile Bay) of present-day southern Alabama, in addition to the entire area of present-day Florida.
St. Augustine, Florida Founded in 1565 by the Spanish conquistador, Pedro Menéndez de Avilés, St. Augustine is the oldest continuously occupied settlement of European origin in the contiguous United States. In 1562, a group of Huguenots led by Jean Ribault arrived in Spanish Florida to establish a colony in the territory claimed by Spain. They explored the mouth of the St. Johns River, calling it la Rivière de Mai (the River May), then sailed northward and established a settlement called Charlesfort at Port Royal Sound in present-day South Carolina. Spain learned of this French expedition through its spies at ports on the Atlantic coast of France. The Huguenot nobleman René de Laudonnière, who had participated in the expedition, returned to Florida in 1564 with three ships and 300 Huguenot colonists. He arrived at the mouth of the River May on June 22, 1564, sailed up it a few miles, and founded Fort Caroline.