Today, I stopped in at the Slidell, Louisiana museum. Slidell is on the other side of Lake Ponchartrain from New Orleans. They have their own Mardi Gras parades in Slidell. Their museum has lots of items about the Civil War. The guy who showed me around told me the Civil War had nothing to do with Slavery. He said that they get taught in Slidell that the Civil War was only about States Rights. Presumably, the right of the states to secede. I'm not sure what they wanted to secede about if it wasn't about slavery, but that's what he told me.
