Before the Battle of Missionary Ridge on 25 November 1863, there was a reorganization that assigned the 7th Texas to James Argyle Smith's brigade in Patrick Cleburne's division. The other units in Smith's brigade were the consolidated 6th Texas and 10th Texas Infantry, and 15th Texas Cavalry Regiments, and the consolidated 17th Texas, 18th Texas, 24th Texas, and 25th Texas Cavalry Regiments. All cavalry units were dismounted. Smith's brigade counted about 1,300 men and was deployed to defend Tunnel Hill at the northern end of Missionary Ridge. Beginning around 10:30 am, Smith's brigade and nearby units became the target of piecemeal Federal attacks. During an early counterattack, Smith was badly wounded and Granbury took command of the brigade. So many gunners from Swett's Mississippi Battery became casualties, that soldiers from the 7th Texas were detailed to man the guns. At 4:00 pm Cleburne ordered a counterattack which was highly successful. Led by Granbury's Texans, the Confederates charged, capturing numerous Union soldiers and sweeping the survivors off Tunnel Hill.