Battle of Chickamauga

The Battle of Chickamauga, fought September 19–20, 1863, marked the end of a Union offensive in southeastern Tennessee and northwestern Georgia called the Chickamauga Campaign. The battle was the most significant Union defeat in the Western Theater of the American Civil War and involved the second highest number of casualties in the war following the Battle of Gettysburg.

• http://en.wikipedia.org/wiki/Battle of Chickamauga