This article goes into some detail about the state of cooking in the Union and the Confederacy during the American Civil War. One of its interesting claims is that the South was suffering from a lack of salt which greatly limited their ability to cure and preserve meat. It states that much of their salt had previously come from Wales, but that had been cut off by the Union naval blockade.
Why would the South be getting its salt from across the Atlantic? Why wouldn't they make salt from seawater in the coastal regions and ship that to the various parts of the Confederacy?