"Lorena" was banned at times by both sides during the War Between The States because it made the soldiers homesick and the general feeling was it caused desertions......Now THAT is a powerful song! it's mainly identified though with the Confederacy and was probably the most heard song around southern campfires.
More info, Midi, and words are HERE. The Midi they use (click on the music icon) is said to be played much as it would have been heard in southern parlors, sounding a bit thin and simplistic. Its a beautiful and haunting melody though and is wonderful on Hammered Dulcimer as well as Fiddle.