The regiment is honored by a monument at Gettysburg.
1861 | |
| August 22 | Right Wing (Cos. A, B, C, D, E and F) organized at Madison, Ind. for 1st Indiana Cavalry |
| September | Moved to Washington, D.C. |
| October 22 | Designated 3rd Cavalry; Attached to Hooker’s Division, Army of the Potomac under the command of Colonel Scott Carter and Major George Chapman; Duty at Budd’s Ferry, Md. |
| November 8 | Capt. Jacob S. Buchanan of Company A becomes lieutenant colonel. |
| December | Assigned to duty in Lower Maryland by Detachments |
| December 15 | Capture of Sloop Victory |
| December | Companies A, B and F in St. Mary’s County, Company E at Maryland Point and Port Tobacco |
1862 | |
| March | Lower Maryland, Middle Department |
| Charles Chase becomes major | |
| May | Attached to Geary’s Independent Brigade, Dept. of the Rappahannock |
| May 3 | Regiment moved to Washington, D.C. |
| May 25 | To Thoroughfare Gap, Va. |
| May 28 | Action at Wardensville |
| June | Attached to Shields’ Division, Dept. of the Rappahannock |
| June 16 | Joined Shield’s Command at Luray and movement to Front Royal |
| July | Attached to Farnsworth’s 2nd Brigade, Pleasanton’s Cavalry Division, Army of the Potomac |
| July | At Bristoe Station |
| July 7 | At Falmouth, Va. |
| July 19 | Major Chase resigns, and is replaced by Robert Klein |
| July 23 | Action at Mt. Carmel Church |
| July 24-26 | Reconnaissance to Orange Court House |
| August 5-8 | Expedition to Frederick’s Hall Station and Spottsylvania Court House |
| August 5-6 | Thornburg’s Mills and Massaponax Church |
| August 26 | Pope’s Campaign in Northern Virginia. Centreville |
| August 29-30 | Battle of Bull Run |
| August 31 | Centreville and Chantilly |
| September – October | Maryland Campaign |
| September 7-8 | Poolesville, Md. |
| September 9 | Nolansville |
| September 9 | Barnesville and Monocacy Church |
| September 10-11 | Sugar Loaf Mountain |
| September 13 | Catoctin Mountain and Middletown |
| September 14 | South Mountain |
| September 16-17 | Battle of Antietam |
| September 19 | Shephardstown Ford |
| October 1 | Reconnaissance to Martinsburg and Shephardstown, W. Va. |
| October 9-12 | Pursuit of Stuart into Pennsylvania |
| October 12 | Mouth of Monocacy |
| October 24 | Lt. Colonel Buchanan resigned and was replaced by George Champan; Captain William S. McClure of Company E become major. |
| November | Attached to 2nd Brigade, Cavalry Division, Army of the Potomac |
| November 1-2 | Philomont |
| November 2-3 | Union |
| November 2-3 | Upperville and Bloomfield |
| November 5-6 | Barber’s Cross Roads |
| November 7 | Waterloo Bridge |
| November 8 | Little Washington |
| December 12-15 | Battle of Fredericksburg, Va. |
1863 | |
| January 20-24 | “Mud March” |
| February | Attached to 1st Brigade, 1st Division, Cavalry Corps, Army of the Potomac |
| March 11 | Colonel Carter resigned; George Chapman become colonel, Robert Kline lieutenant colonel and Captain Charles Lemon of Company C was promoted to major. |
| April 14 | Rearguard at Freeman’s Ford. Lost 26 casualties withdrawing under attack across the rising Rappahannock River |
| April 27 – May 6 | Chancellorsville Campaign |
| April 29-May 8 | Stoneman’s Raid |
| May 1 | Rapidan Station |
| May 29 | William Patton becomes major |
| June 9 | Brandy Station and Beverly Ford |
| June 21 | Upperville and Middleburg |
| July 1-3 | Battle of GettysburgThe regiment was commanded by Colonel George H. Chapman, and was combined for the Gettysburg campaign with the 12th Illinois Cavalry. The 3rd brought 313 men to the field, of whom 6 were killed, 21 wounded and 5 missing, including Major Charles Lemon, who was mortally wounded on July 1st. |
| July 6 | Williamsport, Md. |
| July 8 | Boonsboro |
| July 9 | Benevola (or Beaver Creek) |
| July 10-13 | Funkstown |
| July 14 | Falling Waters |
| July 21-22 | Chester Gap |
| July 31-August 1 | Kelly’s Ford |
| August 1-3 and 4 | Brandy Station |
| September 13-17 | Advance from the Rappahannock to the Rapidan |
| September 13 | Culpeper Court House |
| September 14-16 | Raccoon Ford |
| September 21-23 | Reconnaissance across the Rapidan |
| September 22 | Jack’s Shop, Madison Court House |
| September 22 | Raccoon Ford |
| October 9-22 | Rapidan Campaign |
| October 10 | Raccoon and Morton’s Fords |
| October 11 | Stevensburg, near Kelly’s Ford, and Brandy Station |
| October 12 | Brandy Station, or Fleetwood |
| October 15 | Oak Hill |
| October 25-26 | Near Bealeton |
| November 1 | Catlett’s Station |
| November 7-8 | Advance to line of the Rappahannock |
| November 8 | Muddy Run, Culpeper |
| November 26 | Mine Run Campaign |
| November 29 | Parker’s Store |
1864 | |
| January 20 | Scout from Culpeper to Madison Court House |
| February 6-7 | Demonstration on the Rapidan; Barnett’s Ford |
| February 28 – March 4 | Kilpatrick’s Raid to Richmond |
| March 1 | Fortifications of Richmond, Hanover Junction and Ashland |
| April | Attached to 2nd Brigade, 3rd Division, Cavalry Corps, Army of the Potomac |
| March 4 | Captain Benjamin Q. A. Gresham of Company B promoted to major |
| May-June | Rapidan Campaign |
| May 4 | Near Chancellorsville |
| May 5 | Craig’s Meeting House |
| May 5-7 | Battle of the Wilderness |
| May 8 | Alsop’s Farm, Spotsylvania |
| May 9-24 | Sheridan’s Raid to the James River |
| May 9-10 | North Anna River |
| May 11 | Ground Squirrel Church and Yellow Tavern |
| May 12 | Brook Church (or Richmond Fortifications) |
| May 26 | Demonstration on Little Run |
| May 26-28 | On line of the Pamunkey |
| May 27 | Salem Church |
| May 28-31 | Totopotomoy |
| May 31 | Mechump’s Creek |
| June 1-12 | Battle of Cold Harbor |
| June 2 | Totopotomoy, Gaines’ Mill, Salem Church and Haw’s Shop |
| June 3 | Haw’s Shop and near Via’s House |
| June 12 | Long Bridge |
| June 13 | Riddell’s Shop |
| June 13 | White Oak Swamp |
| June – August | Siege of Petersburg |
| June 22 | Ream’s Station |
| June 22-30 | Wilson’s Raid to Southside & Danville R. R. |
| June 23 | Nottaway Court House and Black and White Station |
| June 24 | Captain George H. Thompson of Company E and Alfred Gadis promoted to major |
| June 25 | Staunton River Bridge (or Roanoke Station) |
| June 28-29 | Sappony Church (or Stony Creek) |
| June 29 | Ream’s Station |
| June 30 | Jarrett’s Station |
| June 30 – July 3 | Ream’s Station |
| July 7 and 22 | Ream’s Station |
| July 21 | Colonel Chapman is promoted to Brigadier General |
| August 7 – November 28 | Sheridan’s Shenandoah Valley Campaign; Army of the Shenandoah, Middle Military Division |
| August 17 | Winchester |
| August 25 | Near Kearneysville |
| September 7 | Near Brucetown and Winchester |
| September 19 | Third Battle of Winchester (Battle of Opequan) |
| September 20 | Near Cedarville |
| September 21 | Front Royal |
| September 22 | Milford |
| September 29 and October 2 | Waynesboro |
| October 7 | Back Road, near Strasburg |
| November 10 | Near Kernstown |
| November 12 | Newtown |
| November 22 | Cedar Creek and Rude’s Hill, near New Market |
| December 19-22 | Expedition from Kernstown to Lacey Springs |
| December 21 | Lacey Springs |
1865 | |
| February 27 – March 25 | Sheridan’s Raid from Winchester |
| March 2 | Waynesboro |
| March 15 | Ashland |
| March 28 | Appomattox Campaign |
| March 30-31 | Dinwiddie Court House |
| April 1 | Battle of Five Forks |
| April 3 | Deep Creek |
| April 5 | Sailor’s Creek |
| April 8 | Appomattox Station |
| April 9 | Appomattox Court HouseSurrender of Lee and his army. |
| May 23 | Grand Review at Washington. D.C. |
| June | Moved to Louisville, Ky. |
| August 7 | Mustered out |