The regiment lost 5 officers and 55 enlisted men killed or mortally wounded and 2 officers and 126 enlisted men to disease during the Civil War. It is honored by a monument at Getysburg.

1861
August – October Recruited in Philadelphia, Bucks, Lycoming and Luzerne Counties and organized at Philadelphia under Colonel Ernest G. Chormann.
October 4 Left State for Washington, D.C. Attached to Porter’s Division, Army Potomac and duty at Arlington Heights, Va., Defenses of Washington, D.C.,
December 31 Colonel Chormann was discharged
1862
January 17 David M. Gregg (USMA 1855) was promoted to colonel. Captain Pennock Huey of Company D was promoted to major.
March Attached to 4th Army Corps, Army Potomac
March 10-15 Advance on Manassas, Va.,
April Moved to the Virginia Peninsula attached to Blake’s Brigade, Cavalry Reserve, Army Potomac
April 11-May 4 Siege of Yorktown
May 13 Baltimore Cross Roads, near New Kent Court House
May 20-23 Operations about Bottom’s Bridge
May 23 Reconnaissance toward Richmond and to Turkey Island Creek Bridge
May 24 Savage Station
May 24-27 Reconnaissance to Seven Pines
May 24 Chickahominy
May 27 Garnett’s Farm and White Oak
May 31-June 1 Battle of Fair Oaks (Seven Pines)
June 22-23 Reconnaissance to White Oak Swamp
June 25-July 1 Seven days before Richmond
June 28-29 Bottom’s Bridge
June 29 Savage Station
July 1 Malvern Hill
July-August At Harrison’s Landing. Attached to 2nd Brigade, Stoneman’s Cavalry Division, Army of the Potomac, except Co. A at Headquarters of Gen. Porter; Co; B at Headquarters of Gen. McClellan; Co. D at Headquarters of Geneneral Philip St. G. Cooke.
July 20 Turkey Island Bridge
July 23 Reconnaissance to Malvern Hill
September Retreat from the Peninsula and movement to Alexandria. Maryland Campaign attached to 2nd Brigade, Pleasanton’s Cavalry Division, Army of the Potomac
September 3-4 Falls Church
September 10-11 Sugar Loaf Mountain
September 12 Frederick
September 13 Middletown
September 16-17
Battle of Antietam

From the brigade marker on the Antietam battlefield:

The Second Brigade crossed the Middle Bridge under a severe fire of the Confederate Artillery posted on Cemetery Hill. The 8th Pennsylvania was thrown to the right to support the Artillery north of this road. The remaining Regiments took position in the ravine on the left between this point and the Antietam, where, in support to the Batteries in front, they remained until relieved by the advance of the Regular Infantry, when the entire Brigade was withdrawn. The 8th Illinois and 3d Indiana moved up the west bank of the creek and bivouacked in rear of the right wing of the Infantry line. The 8th Pennsylvania crossed the Middle Bridge, ascended the east bank of the Antietam, recrossed the stream near Neikirk’s and bivouacked near the Illinois and Indiana Regiments. The 1st Massachusetts recrossed the Antietam by the Middle Bridge and bivouacked near Keedysville.

September 19 Boteller’s Ford, Sharpsburg and Shepherdstown Ford
Amissville September 30
October 1 Reconnaissance from Sharpsburg to Shepherdstown and Martinsburg, W. Va. (3 Cos.)
November 1-2 Philomont
November 2-3 Castleman’s Ferry, Upperville, Union and Bloomfield
November 3 Aldie and Ashby’s Gap
November 4 Markham Station
November 5 Barbee’s Cross Roads
November 7 Waterloo Bridge
November 8 Hazel River
November 10 Newby’s Cross Roads, near Amissville
November 19 Philomont
November 29 Colonel Gregg was promoted to brigadier general.
December 2 Leed’s Ferry and King George Court House
December 12-15 Battle of Fredericksburg
1863
February Attached to 2nd Brigade, 1st Division, Cavalry Corps, Army Potomac
April 27-May 6 Chancellorsville Campaign
April 29 Richard’s Ford and Barnett’s Ford
April 30 Ely’s Ford Road
May 1-2
Battle of Chancellorsville

The regiment was ordered from Hazel Grove to round up Union stragglers, but was not told that the stragglers were due to a massive Confederate attack.  Moving through the woods on a narrow track in column of twos, the 8th Pennaylvania suddenly ran into Confederate infantry. Major Huey saw that the only chance for the regiment was to cut its way through, and he ordered a saber charge.

Most of the regiment succeeded in escaping, but at the cost of 5 men dead and 24 wounded, and 76 men captured. But this clash with Federal cavalry may have directly contributed to Confederate soldiers mistakenly shooting Jackson later that night, assuming they were under another cavalry attack.

May 4 Salem Heights and Banks’ Ford
June Attached to 2nd Brigade, 2nd Division, Cavalry Corps, Army Potomac
June 1 Colonel Ernest Chormann was reinstated.
June 9 Colonel Chormann’s reinstatement was revoked.
June 17 Aldie
June 19 Middleburg
June 21 Upperville
June 25 Thoroughfare GapPennock Huey was promoted to colonel. He took over brigade command during the Gettysburg campaign.
June 30 Westminster, Md.
July 1-3
Battle of Gettysburg

The regiment was commanded by Captain William A. Corrie and took 391 men into the campaign.

This regiment detached with the 2nd Corps, covered the rear of the Army on the march from Virginia. At Frederick rejoined the Cavalry Corps and with Gregg’s Division moved in the advance to Gettysburg July 1st. Moved hastily to Manchester to protect trains July 4th. Joined in the pursuit of the enemy participating in the night attack at Monterey Pass and the many other cavalry engagements until the enemy retreated into Virginia.

July 4 Monterey Gap
July 5 Smithsburg
July 6 Williamsport and Hagerstown, Md.
July 8 Boonsboro
July 10 and 13 Jones’ Cross Roads, near Williamsport
July 10-13 Hagerstown
July 11-12 St. James College
July 14 Williamsport Road
July 16 Shepherdstown
September 2 Rixey’s Ford
September 13-17 Advance from the Rappahannock to the Rapidan
September 13 Culpeper Court House
September 15-16 Rapidan Station
September 22 Robertson’s River
October 9-22 Bristoe Campaign
October 11 Near Warrenton
October 12 Warrenton or White Sulphur Springs
October 14 Auburn and Bristoe
October 14 St. Stephen’s Church
November 7-8 Advance to line of the Rappahannock
November 26-December 2 Mine Run Campaign
November 27 New Hope Church
December 5 Blind Ferry
December 21-23 Raid to Luray Valley
December 31 Regiment reenlisted
1864
January 1-4 Raid through Chester Gap
May-June Rapidan Campaign
May 5-8 Todd’s Tavern
May 8-21 Spottsylvania Court House (Company A)
May 9-24 Sheridan’s Raid to James River
May 9 Matapony Church
May 9-10 North Anna River
May 11 Ground Squirrel Church and Yellow Tavern
May 12 Brook Church or Fortifications of Richmond
May 18 Haxall’s Landing
May 26-28 Line of the Pamunkey
May 28-31 Totopotomoy
May 28 Haw’s Shop
May 31-June 1 Cold Harbor
June 2 Sumner’s Upper Bridge
June 7-24 Sheridan’s Trevillian Raid
June 11-12 Trevillian Station
June 21 White House or St. Peter’s Church and Black Creek or Tunstall Station
June 24
St. Mary’s Church

Beginning of Siege of Petersburg and Richmond. Colonel Huey was captured.

July 12 Warwick Swamp
July 15-16 Charles City Cross Roads
July 27-29 Demonstration north of the James at Deep Bottom
July 28 Malvern Hill
July 30 Warwick Swamp
August 13-20 Demonstration north of the James at Deep Bottom
August 14 Gravel Hill
August 14-18 Strawberry Plains and Deep Run
August 16 Charles City Cross Roads
August 23 Dinwiddie Road, near Ream’s Station
August 25 Ream’s Station
September. 17 Belcher’s Mills
September 29-October 2 Poplar Springs Church
September 30-October 1 Arthur’s Swamp
October 27-28 Boydton Plank Road, Hatchers Run
November 7 Reconnaissance to Stony Creek
December 1 Stony Creek Station
December 7-12 Bellefield Raid
December 9 Colonel Huey was paroled from Camp Asylum in Columbia, South Carolina and returned to the regiment to resume command.
1865
February 5-7 Dabney’s Mills, Hatcher’s Run
March 28-April 9 Appomattox Campaign
March 30-31 Dinwiddie C. H.
April 1 Five Forks
April 5 Paine’s Cross Roads and Amelia Springs
April 6 Deatonville Road and Sailor’s Creek
April 7 Farmville
April 9 Appomattox C. H. Surrender of Lee and his army.
April 23-29 Expedition to Danville
May-July Duty at Lynchburg and in the Dept. of Virginia
June 23 Colonel Huey mustered out
July 1 William A. Corrie was promoted to colonel.
July 24 Mustered out by consolidation with 16th Pennsylvania Cavalry