 September 2, 1863, the regiment crossed the Tennessee, and advanced with the corps of Major General McCook to Trenton, Ga., from whence it crossed the mountains to Alpine, 30 miles from Rome; thence made a forced march toward Chattanooga, between the mountain ranges, and came into line of battle at Chickamauga September 19, 1863.The following day the regiment participated in the battle of Chickamauga, sustaining a loss of 11 killed, 58 wounded, 35 missing, 3 prisoners.Of the missing, 21 were known to be wounded.