History of New Orleans

The history of New Orleans, Louisiana, traces the city's development from its founding by the French, through its period under Spanish control, then briefly back to French rule before being acquired by the United States in the Louisiana Purchase. In the 19th century, it was the largest port in the South, exporting most of the nation's cotton output and other products to Western Europe and New England. It was the largest and most important city in the South; thus it was an early target for capture by the Union during the Civil War. With its rich and unique cultural and architectural heritage, it remains a major destination for tourism, conventions, and major sports events, even after the major destruction and loss of life during Hurricane Katrina and flooding from the levee break after the hurricane in 2005.

The land mass that was to become the city of New Orleans was formed around 2200 BC when the Mississippi River deposited silt creating the delta which would be New Orleans. Before Europeans founded what would become known as the city of New Orleans, the area was inhabited by Native Americans for about 1300 years. The Mississippian culture peoples built mounds and earthworks in the area. Later Native Americans created a portage between the headwaters of Bayou St. John (known to the natives as Bayouk Choupique) and the Mississippi River. The bayou flowed into Lake Pontchartrain. This became an important trade route. Archaeological evidence has shown settlement here dated back to at least 400 A.D.

...
Wikipedia