The 6th-10th-15th Texas fought at the Battle of Ringgold Gap on 27 November 1863. Cleburne posted Granbury's brigade just to the north of the gap. When they were attacked by Charles R. Woods's Union brigade, the Texans routed the three leading Missouri regiments. On 10 December the regiment counted 642 soldiers and it was assigned to Smith's brigade in Cleburne's division. During the Atlanta Campaign in 1864, the brigade fought at the Battle of Rocky Face Ridge, the Battle of Resaca, the Battle of Pickett's Mill, the Battle of Kennesaw Mountain, the Battle of Peachtree Creek, the Battle of Atlanta, and the Battle of Jonesborough. For the campaign, the 10th Texas became an independent regiment by separating from the consolidated 6th-15th Texas. At various times during the campaign, the 10th Texas was commanded by Colonel Mills, Captain A. J. Formwalt, and Lieutenant Colonel Robert B. Young. The Texas brigade, which now included the 7th Texas Infantry Regiment, was led at different times by Smith, Granbury, and Young.