Colonial history of the United States Lower Louisiana. This vast tract was first settled at Mobile and Biloxi around 1700, and continued to grow when 7,000 French immigrants founded New Orleans in 1718. Settlement proceeded very slowly; New Orleans became an important port as the gateway to the Mississippi River, but there was little other economic development because the city lacked a prosperous hinterland. In 1763, Louisiana was ceded to Spain around New Orleans and west of the Mississippi River. In the 1780s, the western border of the newly independent United States stretched to the Mississippi River. The United States reached an agreement with Spain for
Islam in Spain north-east across the Pyrenees Mountains toward France, but were defeated by the Frankish Christian Charles Martel at the Battle of Tours in 732. It is commonly held that the relative ease with which the Great Muslim armies conquered the Iberian Peninsula was due to the centralized nature of government under the rule of the Visigoths. After the defeat of Roderick, the Visigoth dominion over the Iberian peninsula folded and fell apart from the Northern coast of Spain, and the province of Septimania (an area of France going from the Pyrenees to Provence), all areas previously under the rule of the