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
France in the Seven Years' War France in the Seven Years' War France was one of the leading participants in the Seven Years' War which lasted between 1754 and 1763. France entered the war with the hope of achieving a lasting victory against Prussia, Britain and their German allies and with the hope of expanding its colonial possessions.(1) While the first few years of war proved successful for the French, in 1759 the situation reversed and they suffered defeats on several continents. In an effort to reverse their losses, France finished an alliance with their neighbor, Spain, in 1761. In spite of this the French continued