The Twenty-ninth Pennsylvania Volunteer Infantry, commanded by Colonel William Richards, Junior, served in Cobham's Brigade, Geary's Division, Slocum's Twelfth Corps, Hooker's Detachment from the Army of the Potomac. On the night of October 28th, 1863, at Wauhatchie, it was the picket of Geary's White Star Division and received the first attack of Hood's force upon that division about midnight, then participated in the Battle of Wauhatchie for nearly three hours. Early on the morning of November 24th, 1863, the regiment led the advance of Hooker's assault on Lookout Mountain, crossed Lookout Creek at Light's Mill about three miles south of this point at the base of the mountain, ascended to the palisades, then turned north and advanced toward the left flank of the Confederate line nearly two miles away. It helped force the enemy from his works and reached this point, the highest then accessible, then continued the attack on the narrow ledge to the left, reached a point five hundred yards south, and held it until relieved at 9:30 P.M. to replenish ammunition. During the night the enemy retired from the mountain across the valley to Missionary Ridge. On November 25, 1863, when the Battle of Missionary Ridge opened on the extreme left, the regiment descended the mountain, crossed the valley directly east of this point, joined the assault on Missionary Ridge, broke the enemy's line, and reached the crest about 6 P.M. On November 27th, 1863, in pursuit of Bragg's Army, it became engaged at Ringgold, advanced across the open field in front of the depot, and fought until the engagement ended. The regiment returned to its camp near Wauhatchie on December 1, 1863.