Organized at Philadelphia August 23 to November 6, 1861.
Regiment moved to Washington, D.C., September 30, 1861.
Companies "G" and "H" joined in December, 1861.
Attached to Peck's Brigade, Couch's Division, Army Potomac, to March, 1862.
3rd Brigade, 1st Division, 4th Army Corps, Army Potomac, to July, 1862.
2nd Brigade, 1st Division, 4th Army Corps, to September, 1862.
2nd Brigade, 3rd Division, 6th Army Corps, Army Potomac, to October, 1862.
3rd Brigade, 3rd Division, 6th Army Corps, to January, 1864.
Wheaton's Brigade, Dept. West Virginia, to March, 1864.
1st Brigade, 2nd Division, 6th Army Corps, Army of the Potomac, and Army of the Shenandoah, to June, 1865.
Service & Battles - 1862
Duty in the Defences of Washington, D. C., till March, 1862.
Advance on Manassas, Va., March 10-15.
Moved to the Virginia Peninsula March 25.
Siege of Yorktown April 5-May 4.
Battle of Williamsburg May 5.
Slatersville, New Kent Court House, and Sister's Mills May 9.
Battle of Fair Oaks, Seven Pines, May 31-June 1.
Seven days before Richmond June 25-July 1.
About Fair Oaks June 26-29.
Malvern Hill July 1.
At Harrison's Landing to August 16.
Movement to Alexandria, thence to Centreville August 16-30.
Cover Pope's retreat to Fairfax Court House August 30-September 1.
Chantilly September 1 (Reserve).
Maryland Campaign September 6-24.
Battle of Antietam September 16-17 (Reserve).
At Downsville, Md., September 23-October 20.
Movement to Stafford Court House October 20-November 18, and to Belle Plains December 5.
Battle of Fredericksburg, Va., December 12-15.
Service & Battles - 1863
Burnside's 2nd Campaign, "Mud March," January 20-24, 1863.
At Falmouth till April.
Chancellorsville Campaign April 27-May 6.
Operations at Franklin's Crossing April 29-May 2.
Maryes Heights, Fredericksburg, May 3.
Salem Heights May 3-4.
Banks' Ford May 4.
Gettysburg (Pa.) Campaign June 13-July 24.
Battle of Gettysburg July 2-4.
Pursuit of Lee July 5-24.
Duty on line of the Rappahannock till October.
Bristoe Campaign October 9-22.
Advance to line of the Rappahannock November 7-8.
Rappahannock Station November 7.
Mine Run Campaign November 26-December 2.
Service & Battles - 1864
Duty at Brandy Station till May, 1864.
Rapidan Campaign May 4-June 12.
Battles of the Wilderness May 5-7;
Spottsylvania May 8-21.
Assault on the Salient May 12.
North Anna River May 23-26.
On line of the Pamunkey May 26-28.
Totopotomoy May 28-31.
Cold Harbor June 1-12.
Before Petersburg June 17-18.
Jerusalem Plank Road June 22-23.
Siege of Petersburg till July 9.
Moved to Washington D.C., July 9-11.
Defence of Washington against Early's attack July 11-12.
Pursuit to Snicker's Ferry July 14-18.
Sheridan's Shenandoah Valley Campaign August to December.
Charlestown August 21-22.
Demonstration on Gilbert's Ford, Opequan Creek September 13.
Battle of Opequan, Winchester, September 19.
Strasburg September 21.
Fisher's Hill September 22.
Battle of Cedar Creek October 19.
Duty in the Shenandoah Valley till December.
Ordered to Petersburg December 9-12.
Service & Battles - 1865
Siege of Petersburg December, 1864, to April, 1865.
Dabney's Mills, Hatcher's Run, February 5-7, 1865.
Fort Fisher, Petersburg, March 25.
Appomattox Campaign March 28-April 9.
Assault on and fall of Petersburg April 2.
Pursuit of Lee April 3-9.
Appomattox Court House April 9.
Surrender of Lee and his army.
March to Danville April 23-27, and duty there till May 23.
Moved to Richmond, thence to Washington May 23-June 3.
Corps Review June 8, Mustered out June 29, 1865.
Regiment lost during service 9 Officers and 112 Enlisted men killed and mortally wounded and 1 Officer and 72 Enlisted men by disease. Total 194.
98th PA Regiment Medal of Honor Recipients
McADAMS, PETER Corporal, Company A, 98th Pennsylvania Infantry. Entered service at: Philadelphia, Pa. Birth: Ireland. Citation: Went 250 yards in front of his regiment toward the position of the enemy and under fire brought within the lines a wounded and unconscious comrade. At Salem Heights, Va., 3 May. Date of issue: 1 April 1898.