Organized at Baltimore, Md., August, 1862. Moved from Baltimore to the Antietam, Md., September 18, 1852. Attached to Kenly's Maryland Brigade, Defences Upper Potomac, 8th Army Corps, Middle Department, to March, 1863. 1st Brigade, 1st Division, 8th Army Corps, to June, 1863. Maryland Brigade, French's Command, 8th Army Corps, to July, 1863. 3rd Brigade, 3rd Division, 1st Army Corps, Army of the Potomac, to December, 1863. 2nd Brigade, 3rd Division, 1st Army Corps, to March, 1864. 3rd Brigade, 2nd Division, 5th Army Corps, to June, 1864. 2nd Brigade, 2nd Division, 5th Army Corps, to May, 1865.
Regiment lost during service 3 Officers and 54 Enlisted men killed and mortally wounded and 70 Enlisted men by disease. Total 127.
Defense of Williamsport, Md., September 20-21, 1862. Duty between Williamsport and Hagerstown, Md., till December 11. Moved to Maryland Heights December 11-12, and duty there till April 9, 1863. At Bolivar Heights till April 30. Moved to Grafton and Clarksburg, W. Va., to repel invasion. Operations against Jones and Imboden May 1-26. Return to Maryland Heights May 26, and duty there till June 30. Retreat to Frederick, Md., June 30, and guard bridges over the Monocacy till July 6. Reoccupation of Maryland Heights July 7. Joined 1st Army Corps, Army of the Potomac, near Boonsborough, Md., July 10. Pursuit of Lee to Warrenton, Va., July 12-24. At Warrenton Junction, Va., July 25-27. Near Rappahannock Station August 4-September 16. Advance to the Rapidan September 16-18. Bristoe Campaign October 9-22. Bristoe Station October 14. Haymarket October 19. Guard Orange & Alexandria Railroad October 24-November 23. Mine Run