Missing the action at the Second Battle of Bull Run since D.H.Hill's Division was sent to Richmond to guard the capital, the regiment was engaged at the battles of South Mountain, Sharpsburg, Fredericksburg and Chancellorsville as part of Rodes Brigade. After the reorganization of the Army of Northern Virginia in the spring of 1863, Col. O'Neal took charge of the brigade, as General Rodes went on to command the Division as part of the Second Corps. The regiment took part in the Battle of Gettysburg. Cullen A. Battle later replaced O'Neill as brigade commander and the regiment went on to participate in the Bristoe and Mine Run Campaigns, before being on special duty.