100th Pennsylvania Infantry

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Regimental History and Service Record

Organized at Pittsburg August 31, 1861. Left State for Washington, D.C., September 2, and duty there until October 9. Moved to Annapolis, Md., October 9. Attached to Stevens' 2nd Brigade, Sherman's South Carolina Expedition, to April, 1862. 2nd Brigade, 2nd Division, Dept. of the South, to July, 1862. 2nd Brigade, 1st Division, 9th Army Corps, Army Potomac, to September, 1863. 3rd Brigade, 1st Division, 9th Army Corps, to April, 1863. 3rd Brigade, 1st Division, 9th Army Corps, Dept. Ohio, to June, 1863. Army of the Tennessee, to August, 1863, and Army Ohio, to March, 1864. 2nd Brigade, 1st Division, 9th Army Corps, Army Potomac, to June, 1864. 1st Brigade, 1st Division, 9th Army Corps, to September, 1864. 3rd Brigade, 1st Division, 9th Army Corps, to July, 1865.

SERVICE.--Sherman's Expedition to Port Royal Harbor, S.C., October 21-November 7, 1861. Capture of Forts Walker and Beauregard, Port Royal Harbor, November 7. Occupation of Beaufort, S.C., December 8, and duty there until June, 1862. Port Royal Ferry, Coosa River, January 1. Operations on James Island, S.C., June 1-28. Legaire's Point, James Island, June 3. Skirmishes on James Island June 3-4. Battle of Secessionville, James Island, June 16. Evacuation of James Island and movement to Hilton Head, S.C., June 28-July 7. Moved to Newport News, Va., July 12-17, thence to Fredericksburg August 4-6. Operations in support of Pope August 6-16. Pope's Campaign in Northern Virginia August 16-September 2. Battles of Groveton August 29; Bull Run August 30; Chantilly September 1.

March up the Potomac to Leesburg, thence to Falmouth October II-November 18. Battle of Fredericksburg December 12-15. Burnside's 2nd Campaign, "Mud March," January 20-24, 1863. Moved to Newport News, Va., February 13, thence to Covington, Ky., March 20-28. Duty in District of Kentucky. At Paris, Nicholasville, Lancaster, Stanford and Somerset until June. Movement through Kentucky to Cairo, Ill., June 4-10, thence to Vicksburg, Miss., June 14-17.

Advance on Jackson, Miss., July 5-10. Siege of Jackson July 10-17. Duty at Milldale until August 6. Moved to Covington, Ky., thence to Crab Orchard, Ky., August 6-18. March to Knoxville, Tenn., September 10-26, and duty there until October 3. Action at Blue Springs October 10. Knoxville Campaign November 4-December 23. Campbell Station November 16. Siege of Knoxville November 17-December 4. Repulse of Longstreet's assault on Fort Saunders November 29. Pursuit of Longstreet December 5-24. At Blain's Cross Roads until January, 1864. Veterans marched over Cumberland Mountains to Nicholasville, Ky., January, and on furlough until March. Ordered to Annapolis, Md., and duty there until April.

Before Petersburg June 16-18. Siege of Petersburg June 16, 1864, to April 2, 1865. Mine Explosion, Petersburg, July 30, 1864. Weldon Railroad August 18-21. Poplar Springs Church September 29-October 2. Reconnaissance on Vaughan and Squirrel Level Road November 8. Boydton Plank Road, Hatcher's Run, October 27-28. Fort Stedman March 25, 1865. Appomattox Campaign March 28-April 9. Assault on and fall of Petersburg April 2. Occupation of Petersburg April 3. Pursuit of Lee April 3-8. Moved to Washington, D. C, April 21-28, and duty there until July.

Regimental Roster

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Regiment Statistical Information

Regiment Casualty Comparisons by Source
Source Casualties Remarks
Dyer
  • 16 Officers and 208 enlisted men killed and mortally wounded
  • 2 Officers and 183 enlisted men killed by disease
  • Total 409
None
Fox
  • 16 Officers and 208 enlisted men killed and mortally wounded
  • Total 224 (Combat Losses)
  • Fox lists this unit as:
    • 22nd on the list of units "sustaining greatest loss in action" (Infantry units with over 200 casualties)
    • 150th on the list of units with losses based on duration of the entire term of service of the unit (28th of the Pennsylvania troops)
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WotRWiki Statistics
  • 0 troops killed
    • Includes 0 troops mortally wounded
    • Includes 0 troops killed by disease
    • All others are troops killed in action or under special circumstances
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Legacy

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Notes

  1. Not originally listed on Dyer summary - makes sense with unit configuration

Sources