This is actually a lesson teaching the history of the Battle-worth the read
Largely forgotten today, and overshadowed in its own time by battles at Shiloh and Fort Donelson, Mill Springs was the first significant Union victory of the Civil War. It proved crucial to Union control of Kentucky and the interior South and shaped later developments in the war. Mill Springs was important for another reason: it revealed the deep divisions that existed throughout the border states.
You will find the full article here: http://www.nps.gov/nr/twhp/wwwlps/lesso ... 72mill.htm
MG Elkin