Northern Name for Battle: Chickamauga Southern Name for Battle: Chickamauga Location of Battle: Catoosa County and Walker County, Georgia Date of Battle: September 19-21, 1863 Northern Commander: George Henry Thomas Southern Commander: Braxton Bragg Winner: Confederates Northern Troops Involved: 58,000 Southern Troops Involved: 68,000 Northern Casualties: 16,170 Southern Casualties: 18,454 Interesting Facts: This battle was the second costliest battle of the Civil War.