Chickamauga and Chattanooga National Military Park, located in northern Georgia and southeastern Tennessee, preserves the sites of two major battles of the American Civil War: the Battle of Chickamauga and the Siege of Chattanooga. A detailed history of the park's development was provided by the National Park Service in 1998.

The Battle of Chickamauga, fought on September 18–20, 1863, between the United States Army and Confederate forces in the American Civil War, marked the end of a U.S. Army offensive, the Chickamauga Campaign, in southeastern Tennessee and northwestern Georgia. It was the first major battle of the war fought in Georgia, the most significant US defeat in the Western Theater, and involved the second-highest number of casualties after the Battle of Gettysburg.