Missouri and Kansas
As a Missourian I found this movie greatly interesting and pretty accurate historically. I had family members that fought for the north and south, and during Wilson's Creek actually fought against each other. One of my family members rode with Quantril at times in southern Missouri.
This movie is also a good history lesson for those who don't know much about the University of Missouri and University of Kansas sports rivalry, and why it is the longest running rivalry West of the Mississippi. I still havent found a copy of this movie available to rent within a month of the KU/MU football game in Columbia. I guess all us Bushwacking Tigers like to see those Jayhawkers in Lawrence get beat on screen just incase they beat us on the field.