The regiment lost 3 officers and 65 enlisted men killed or mortally wounded and 3 officers and 130 enlisted men to disease during the Civil War. It is honored by a monument at Gettysburg.

From the monument: “Casualties in action during the war: Killed 1 officer, 32 men, total 33; Wounded 10 officers, 147 men, total 157; Captured or missing 12 officers, 208 men, Total 220. Aggregate 410.”

1861
April 5, Patterson’s Union Cavalry (later Company G) organized at Pittsburgh, Pa.
August Companies A-F organized at Baltimore and attached to Dix’s Command, Baltimore, Md.; Companies G, H, I and K attached to 1st Virginia Union Cavalry, Department of West Virginia
August 19 Companies H and I organized in Washington and Allegheny Counties, Pa. Morehead’s Cavalry Company (later Company K) organized at Allegheny City, Pa.; Co. K ordered to Washington, D.C., attached to Landers’ Command, Army of the Potomac, duty at Williamsport, Hancock and Cumberland, Md.
September 3-4 Skirmishes at Edward’s Ferry (Company. K)
October 3 Action at Greenbrier, W. Va. (Company G)
October 21 Ball’s Bluff, Va. (Detachment)
1862
January Companies G, H, I and K assigned to 1st Maryland Cavalry
January 4 Stone’s Cross Roads, Ball’s Bluff, Bath and Alpine Station (Companies G, H and I)
January 5-6 Hancock (Company K)
January 7-
February 14
Bloomery Gap (Company I)
February – March At Baltimore
March Assigned to Hatch’s Cavalry Brigade, Dept. of the Shenandoah
March to June Operations in Shenandoah Valley
March 7-15 Advance on Winchester
May 24-26 Pursuit of Jackson up the Valley. Retreat to Williamsport, Md.
May 24 Middletown (Company. A, B, C, G and I)
May 25 Winchester (Company A, B, C, G and I); (Company D, F, H, K and L arrive at Harper’s Ferry)
May 28 Charlestown
May 28-30 Defense of Harper’s Ferry (Company D, F, H, K and L)
June 9 Near Harper’s Ferry
June Attached to Cavalry Brigade, 2nd Corps, Pope’s Army of Virginia
July 12-17 Expedition to Madison Court House, Culpeper and Orange Court Houses
July 12 Near Culpeper
July 13 Rapidan Station
August 8 Madison Court House
August 9 Battle of Cedar Creek
August 16 – September 2 Pope’s Campaign in Northern Virginia
August 21-23 Fords of the Rappahannock
August 23-24 Fauquier, White Sulphur Springs
August 28 Gainesville
August 29 Groveton
August 30 Bull Run
September 1 Chantilly
September 2 Evacuation of Winchester (Companies H & I)
September Assigned to the Cavalry Brigade, 11th Army Corps, Army of the Potomac
September 6 Frederick, Md.
September 7 Boonsboro, Md.
September 10 Near Boonsboro
September 12-13 Maryland Heights and Harper’s Ferry (Companies H & I)
September 14 Cut way through enemy’s lines (Companies H & I)
September 14 Culpeper
September 15 Sharpsburg
September 16 Capture of Longstreet’s trains (Companies. H & I); Rapidan Station
September – December Duty in the Defenses of the Upper Potomac covering Washington, D.C.
October 23-24 Manassas, Va.
October 29 Affair opposite Williamsport (Detachment)
November 9 Reconnaissance from Bolivar Heights to Rippen, W. Va. (2 Companies)
December 2-6 Reconnaissance to Winchester (Detachment)
December 12-15 Battle of Fredericksburg
December 27 Dumfries
1863
January – Apri Duty in the defenses of the Upper Potomac
January 26 Near Cumberland, Md., Grove Church, near Morrisville
February Attached to Defenses Upper Potomac, 8th Army Corps, Middle Department; then 2nd Brigade, 3rd Division, Cavalry Corps, Army of the Potomac
April 27 – May 8 Chancellorsville Campaign, Stoneman’s Raid
May 3 South Anna Bridge, near Ashland
June Attached to 1st Brigade, 2nd Division, Cavalry Corps
June 9 Brandy Station, or Fleetwood, and Beverly Ford
June 17 Aldie
June 21 Frederick, Md. (Detachment)
June 23 Upperville
June 25 Middleburg
June 30 Westminster
July 1-3
Battle of Gettysburg

The regiment was commanded by Lieutenant Colonel James M. Deems. It brought 335 men to the field and lost two wounded and one missing.

July 4-6 Emmettsburg
July 5 Middletown
July 7 Leitersburg
July 8 Cavetown
July 10 Hagerstown and Old Antietam Forge, near Leitersburg
July 14 and 16 Shepherdstown
September 6 Beverly Ford
September 13-17 Advance from the Rappahannock to the Rapidan
September 13 Culpeper Court House
September 13 and 15-16 Rapidan Station
September 15 Raccoon Ford
September 21 White’s Ford
October Attached to Provost Marshal General’s Command, Army of the Potomac
October 9-22 Bristoe Campaign
October 10 Germania Ford and James City
October 11 Near Warrenton
October 12-13 White Sulphur Springs
October 14 Bristoe Station; Near Centreville and Brentsville
November 7-8 Advance to line of the Rappahannock
November 26 – December 2 Mine Run Campaign
November 26 Grove Church, near Morrisville
November 29 Parker’s Store
December Duty In Middle Department
1864
February Attached to 3rd Separate Brigade, 8th Army Corps, Middle Dept.
May 6 Princeton
May 8 Jeffersonville
June Attached to 3rd Brigade, 1st Division, 10th Army Corps, Army of the James, Dept. of Virginia and North Carolina
June 16-17 Wier Bottom Church, on Bermuda Hundred Front, Va.
June 19 Richmond and Petersburg R. R.
July 21 Deep Bottom
July 27-28 New Market Heights
August 14-18 Strawberry Plains, north of the James
August 14 Flusser’s Mills
August 16-18 Deep Run
August 25 – September 27 Siege of Petersburg
September 28-30 Battle of Chaffin’s Farm
October Attached to 3rd Brigade, Cavalry Division, Dept. of Virginia and North Carolina
October 7 New Market Heights
October 13 Darbytown Road
October 27-28 Fair Oaks
December 7 Smithfield
1865
January Duty before Richmond
January 30 Scout to Long and Bottom’s Bridge
February 11-15 Expedition to Fearnsville and Smithfield
March 28-
April 9
Appomattox Campaign
March 30-31 Dinwiddie Court House
April 1 Five Forks
April 2 Sutherland Station
April 3 Burgess Mills
April 4 Deep Creek
April 5 Amelia Court House
April 6 Sailor’s Creek and Harper’s Farm
April 6-7 Farmville
April 9
Appomattox Court House

Surrender of Lee and his army

April Cavalry, Dept. of Virginia
April 23-29 March to Danville
April – August Duty in the Department of Virginia
August 8 Mustered out