A collection of traditional American folk tunes

[Friedrich Hueppe]

https://m.youtube.com/watch?feature=yout...8DGPvY9Tas 

Here is an instrumental album by Adam Young (the guy behind Owl City). This work retells the story of the final stages of the American civil war. It contains original compositions as well as arrangements of traditional American folk tunes. Can somebody help me find out what these tunes are? Amazing Grace I recognise but what about the others?

Thanks in advance.
Friedrich Hueppe