Funny you should be asking about Civil War songs now - I have been researching that very thing. I lead a children's choir, and we are doing a program on the Civil War. There are some great Civil War sites on the internet. Here are a few soldiers' songs: Goober Peas Tenting on the Old Camp Ground When Johnny Comes Marching Home The Old Union Wagon The Southern Soldier The Southern Wagon Here's Your Mule Farewell to Grog
These are only a few. You can find lots more. A good source is "Ballads and Songs of the Civil War" by Mel Bay Publications. Enjoy!