I learned "Goober Peas" in grade school, and we would substitute the name of our school for "Georgia Militia." I have always liked "Stonewall Jackson's Way," and am currently very fond of "Roll Alabama Roll," though I suspect that may date from after the war. I have an incredibly weird album that I got about 1962, called "The Blue and the Gray--Songs of the American Civil War." It's a recording of music from a 1958 BBC broadcast, and I must say it's a kick to hear "Dixie" sung with just a hint of British accent.