Louisiana Guide

Construction and elaboration of the levee system was critical to the state's ability to cultivate export crops, especially cotton and sugar cane. Enslaved Africans built the first levees under planter direction. Later levees were expanded, heightened and added to mostly by Irish immigrant laborers, whom contractors hired when doing work for the state. As the 19th century progressed, the state had an interest in ensuring levee construction. By 1860 Louisiana had built 740 miles of levees on the Mississippi River and another 450 miles of levees on its outlets. These immense earthworks were built mostly by hand. They averaged six feet in height, and up to twenty feet in some areas. [5]

Enfranchised elite whites' strong economic interest in maintaining the slave system contributed to Louisiana's decision to secede from the union. It followed other Southern states in seceding after the election of Abraham Lincoln as President of the United States. Louisiana's secession was announced on January 26, 1861, and it became part of the Confederate States of America.

The state was quickly defeated in the Civil War, a result of Union strategy to cut the Confederacy in two by seizing the Mississippi. Federal troops captured New Orleans on April 25, 1862. Because a large part of the population had Union sympathies (or compatible commercial interests), the Federal government took the unusual step of designating the areas of Louisiana under Federal control as a state within the Union, with its own elected representatives to the U.S. Congress.