The 13th Ohio Cavalry Regiment lost 4 officers and 61 enlisted men killed or mortally wounded and 1 officer and 51 enlisted men to disease during the Civil War.

1864
May 5, Mustered in. Organized by a consolidation of 4th and 5th Battalions Cavalry under Colonel Stephen R. Clark.
May 11 Left State for Annapolis, Md.
May 14-18 At Washington, D.C.
May 18 March to White House Landing, Va.
June Moved to Cold Harbor, Va. and attached to 1st Brigade, 3rd Division, 9th Army Corps, Army Potomac
June 6-12 Operations about Cold Harbor
June 16-19 Before Petersburg; Siege operations against Petersburg and Richmond, Va. begin
July 30 Petersburg Mine Explosion

The regiment lost over 100 casualties.

August 10 Assigned to 1st Brigade, 1st Division, 9th Army Corps
August 18-21 Weldon Railroad
September 29-October 2 Poplar Springs Church
October 8 Vaughan and Squirrel Level Road
October 27-28 Boydton Plank Road, Hatcher’s Run
December 12 Equipped for Cavalry services and assigned to 3rd Brigade, 2nd Division, Cavalry Corps, Army of the Potomac
1865
February 5-7 Dabney’s Mills, Hatcher’s Run
March 28-April 9 Appomattox Campaign
March 30-31 Dinwiddie Court House
April 1 Five Forks
April 2 Fall of Petersburg
April 5 Amelia Springs
April 6 Sailor’s Creek and Harper’s Farm
April 7 Farmville
April 9 Appomattox Court House. Surrender of Lee and his army.
April 23-29 Expedition to Danville to cooperate with Gen. Sherman.
May Assigned to provost duty in Amelia and Powhatan Counties attached to Sub-District of the Appomattox, District of the Nottaway, Dept. of Virginia
August 10 Mustered out