Companies "A," "B," "C," "D," "E," "F" and "G" organized at Camp Curtin, Pa., and mustered into State service July and August, 1861. Moved to Camp Jones, near Washington, D. C., August. Companies "H," "I" and "K" organized at Camp Wilkins, Pittsburg, August, 1861. Joined Regiment at Washington. Company "L" organized as an Independent Company July 30, 1861. On duty at Baltimore till January, 1862; then joined Regiment. Company "M" organized as an Independent Company August 5, 1861. At Baltimore, Md., till October 3, 1861; then on eastern shore of Maryland under Lockwood picketing and scouting till January, 1862; then joined Regiment. Regiment attached to McCall's Division. Army of the Potomac, to March, 1862. Cavalry, McDowell's 1st Army Corps, Army of the Potomac, to April, 1862. Bayard's Cavalry Brigade, Dept. of the Rappahannock, to June, 1862. Bayard's Cavalry Brigade, 3rd Army Corps, Army of Virginia, to September, 1862. Bayard's Brigade, Cavalry Division, Army of the Potomac, to January, 1863. 2nd Brigade, 3rd Division, Cavalry Corps, Army of the Potomac, to June, 1863. 1st Brigade, 2nd Division, Cavalry Corps, Army of the Potomac, to June, 1865.

SERVICE:
Reconnoissance to Leesburg, Va., October 20, 1861. Reconnoissance to Hunter's Mills October 20 (Detachment). Expedition to Dranesville November 26-27. Action at Dranesville November 27. Expedition to Gunnell's Farm December 6. Action at Dranesville December 20 (Cos. "C," "D," "E," "H" and "I"). At Camp Pierpont till March, 1862. Companies "L" and "M" join Regiment January 7. Advance on Manassas, Va., March 10-15. McDowell's advance to Falmouth April 9-17. Reconnoissance to Falmouth April 17-19. Falmouth April 19. Rappahannock River May 13 (Cos. "F," "G," "H," "L" and "M"). Strasburg and Staunton Road June 1-2. Mount Jackson June 3. New Market June 5. Harrisonburg June 6. Battle of Cross Keys June 8. Harrisonburg June 9. Scouting on the Rappahannock June-July. Reconnoissance to James City July 22-24. Skirmish at Madison Court House July 23. Slaughter House August 8. Battle of Cedar Mountain August 9. Pope's Campaign in Northern Virginia August 16-September 2. Stevensburg, Raccoon Ford and Brandy Station August 20. Fords of the Rappahannock August 21-23. Special duty at General Pope's Headquarters August 22-30. Thoroughfare Gap August 28 (Cos. "I" and "M"). Gainesville August 28. Battle of Bull Run August 29-30. Germantown August 31. Centreville and Chantilly August 31. Chantilly September 1. Fairfax Court House September 2. Battle of Antietam, Md., September 16-17. Scout to Warrenton September 29. Aldie and Mountsville October 31. Salem, New Baltimore and Thoroughfare Gap November 4. Warrenton November 6. Rappahannock Station November 7, 8 and 9. Battle of Fredericksburg, Va., December 12-15. Picket near King George Court House till January, 1863. "Mud March" January 20-24. (Co. "H" at Headquarters of 6th Corps February 22 to August 15.) Picket duty from Falmouth to Port Conway till April 26. Chancellorsville Campaign April 26-May 8. Oak Grove April 26. Rapidan Station May 1. (Co. "H" at Chancellorsville May 1-5.) Stoneman's Raid May 27-April -8. Brandy Station or Fleetwood and Beverly Ford June 9. Aldie June 17. Special duty at Corps Headquarters June 28. Battle of Gettysburg, Pa., July 1-3. Emmettsburg, Md., July 4. Guarding Reserve Artillery July 5-10. Companies "A" and "B" advance for 6th Army Corps from Gettysburg to Hagerstown, Md., July 5-10. Old Antietam Forge, near Leitersburg, July 10. Near Harper's Ferry, W. Va., July 14. Shepherdstown July 15-16. Picket near Warrenton July-August. Rixeyville and Muddy Run August 5. Wilford's Ford August 9 (Detachment). Carter's Run September 6. Scout to Middleburg September 10-11. Advance from the Rappahannock to the Rapidan September 13-17. Culpeper Court House September 13. Near Auburn October 1 (Detachment). Bristoe Campaign October 9-22. Warrenton or White Sulphur Springs October 12-13. Auburn and Bristoe October 14. Brentsville October 14. Advance to line of the Rappahannock November 7-8. Rappahannock Bridge November 7-8. Mine Run Campaign November 26-December 2. New Hope Church November 27. Expedition to Turkey Run Station January 1-4, 1864. Scout to Piedmont February 17-18. Campaign from the Rapidan to the James May 4-June 12. Todd's Tavern May 5, 6, 7 and 8. Corbin's Bridge May 8. Sheridan's Raid May 9-24. New Castle and Davenport May 9. North Anna River May 9-10. Ashland May 11. Ground Squirrel Church and Yellow Tavern May 11. Brook's Church, Richmond Fortifications, May 12. Milford Station May 21. On line of the Pamunkey May 26-28. Haw's Shop May 28. Totopotomoy May 28-31. Cold Harbor May 28-31. Sumner's Upper Bridge June 2. Sheridan's Trevillian Raid June 7-24. Trevillian Station June 11-12. Newark or Mallory's Cross Roads June 12. White House or St. Peter's Church June 21. Black Creek or Tunstall's Station June 21. St. Mary's Church June 24. Hope Church June 24. Bellefield July. Warwick Swamp July 12. Demonstration north of the James July 27-29. Malvern Hill and Gaines Hill July 28. Lee's Mills July 30. Demonstration north of James River August 13-20. Gravel Hill August 14. Malvern Hill August 16. Strawberry Plains August 16-18. Dinwiddie Road, near Ream's Station, August 23. Ream's Station August 25. Old members mustered out September 9. Consolidated to a Battalion of five Companies September 9. Belcher's Mills September 17. Poplar Springs Church September 29-October 2. Arthur's Swamp September 30-October 1. Charles City Cross Roads October 1. Hatcher's Run October 27-28. Reconnoissance toward Stony Creek November 7. Stony Creek Station December 1. Hicksford Raid December 7-12. Bellefield December 9-10. Dabney's Mills, Hatcher's Run, February 5-7, 1865. Appomattox Campaign March 28-April 9. Dinwiddie Court House March 30-31. Five Forks April 1. Amelia Springs April 5. Sailor's Creek April 6. Farmville April 7. Appomattox Court House April 9. Surrender of Lee and his army. Expedition to Danville April 23-29. Moved to Washington, D. C. Grand Review May 23. Consolidated with 6th and 17th Pennsylvania Cavalry to form 2nd Provisional Cavalry June 17, 1865.

Regiment lost during service 9 Officers and 87 Enlisted men killed and mortally wounded and 1 Officer and 104 Enlisted men by disease. Total 201.