The 4th Maryland Infantry Regiment lost 3 officers and 32 enlisted men killed or mortally wounded and 1 officer and 72 enlisted men to disease during the Civil War.

July – August Organized at Baltimore, Md.
September 18 Left Baltimore for the Antietam, Md. Attached to Kenly’s Maryland Brigade, Defenses of the Upper Potomac, 8th Army Corps, Middle Department
September 20-21 Defense of Williamsport, Md.
September-December Duty between Williamsport and Hagerstown
December 11-12 Moved to Maryland Heights
March Attached to 1st Brigade, 1st Division, 8th Army Corps
April 9 At Bolivar Heights
April 30-May 1 Moved to Grafton and Clarksburg, W. Va. to repel invasion.
May 1-26 Operations against Jones and Imboden
May 26 Reported at Maryland Heights
June Attached to Maryland Brigade, French’s Division, 8th Army Corps
June 30 Retreat to Frederick, Md. and guard bridges on the Monocacy
July 7 Reoccupation of Maryland Heights
July 10 Joined 1st Army Corps near Boonsborough, Md. attached to 3rd Brigade, 3rd Division, 1st Army Corps, Army of the Potomac
July 12-24 Pursuit of Lee to Warrenton, Va.
July 25-27 At Warrenton Junction
August 4 Near Rappahannock Station
September 16-18 Advance to the Rapidan
October 9-22 Bristoe Campaign
October 14 Bristoe Station
October 19 Haymarket
October 24-November 23 Guard Orange & Alexandria Railroad
November 26-December 2 Mine Run Campaign
December Duty near Culpeper attached to 2nd Brigade, 3rd Division, 1st Army Corps
February 6-7 Demonstration on the Rapidan
March Attached to 3rd Brigade, 2nd Division, 5th Army Corps
May 3-June 15 Campaign from the Rapidan to the James
May 5-7
Battle of the Wilderness
May 8 Laurel Hill
May 8-21
Spotsylvania Court House
May 12 Assault on the Salient
May 19 Harris Farm or Fredericksburg Road
May 23-26 North Anna River
May 23 Jericho Ford
May 26-28 On line of the Pamunkey
May 28-31 Totopotomoy
June 1-12 Cold Harbor
June Attached to 2nd Brigade, 2nd Division, 5th Army Corps
June 1-3 Bethesda Church
June 16-18 First Assault on Petersburg
June 16 Siege of Petersburg begins
June 22-24 Jerusalem Plank Road, Weldon Railroad
July 30 Mine Explosion, Petersburg (Reserve)
August 18-21 Weldon Railroad
September 29-October 2 Poplar Grove Church
October 2-5 Yellow House
October 7-8 Peeble’s Farm
October 8 Davis House
October 27-28 Boydton Plank Road, Hatcher’s Run
December 7-12 Warren’s Raid on Weldon Railroad


February 5-7 Dabney’s Mills, Hatcher’s Run
March 28-April 9 Appomattox Campaign
March 29-31 Boydton Plank Road and White Oak Road
April 1
Five Forks
April 2 Fall of Petersburg
April 3-9 Pursuit of Lee
April 9
Appomattox Court House

Surrender of Lee and his army.

May 1-12 March to Washington, D.C.
May 23 Grand Review
May 31 Mustered out