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Muster In: Organized at Detroit, Mich., August 8 to 22, 1862.1
Muster Out: Mustered out June 3, 1865.2

Commander(s):
Colonel Constant Luce
Commander Image

Lieutenant Colonel Frederick W. Swift
Commander Image

Captain Joseph A. Sudborough
Commander Image

Commander 4
Commander Image

First Offensive Order of Battle: Acting Engineers | Third Division | IX Corps | Army of the Potomac | Union Army3,4

Second Offensive Order of Battle: Acting Engineers | Third Division | IX Corps | Army of the Potomac | Union Army6,7

Third Offensive Order of Battle: Acting Engineers | Third Division | IX Corps | Army of the Potomac | Union Army10,11

  • Commander: Colonel Constant Luce (July 31, 1864)12
  • Unit Strength:
  • Weapons:

Fourth Offensive Order of Battle: Acting Engineers | Third Division | IX Corps | Army of the Potomac | Union Army13,14

  • Commander: Captain Joseph A. Sudborough (August 31, 1864)15
  • Unit Strength:
  • Weapons:

Fifth Offensive Order of Battle: Acting Engineers | First Division | IX Corps | Army of the Potomac | Union Army16,17

  • Commander:
  • Unit Strength:
  • Weapons:

Sixth Offensive Order of Battle: Acting Engineers | First Division | IX Corps | Army of the Potomac | Union Army18,19

  • Commander: Colonel Constant Luce (October 31, 1864)20
  • Unit Strength:
  • Weapons:

Seventh Offensive Order of Battle: Acting Engineers | First Division | IX Corps | Army of the Potomac | Union Army21

  • Commander: Lieutenant Colonel Frederick W. Swift (December 31, 1864)22
  • Unit Strength:
  • Weapons:

Eighth Offensive Order of Battle: Acting Engineers | First Division | IX Corps | Army of the Potomac | Union Army23,24

  • Commander: Lieutenant Colonel Frederick W. Swift (January 31 & February 28, 1865)25,26
  • Unit Strength:
  • Weapons:

Ninth Offensive Order of Battle: Acting Engineers | First Division | IX Corps | Army of the Potomac | Union Army27,28,29

  • Commander: Lieutenant Colonel Frederick W. Swift (March 31, 1865)30
  • Unit Strength:
  • Weapons:
  • Note: This unit is listed in the casualty returns for the Battle of Fort Stedman, March 25, 1865, implying it was present during the battle.31

Dyer’s/Sifakis’ Compendium Info:
Siege of Petersburg Battles32:

  • Before Petersburg June 16-18.
  • Siege of Petersburg June 16, 1864, to April 2, 1865.
  • Mine Explosion, Petersburg, July 30, 1864.
  • Six Mile House, Weldon Railroad, August 18-21.
  • Poplar Springs Church, September 29-October 2.
  • Reconnoissance on Vaughan and Squirrel Level Roads October 8.
  • Boydton Plank Road, Hatcher’s Run, October 27-28.
  • Fort Stedman, Petersburg, 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 3-9.

Bibliography:

    Siege of Petersburg Documents Which Mention This Unit:

      Sources:

      1. A Compendium of the War of the Rebellion by Frederick H. Dyer (Part 3)
      2. A Compendium of the War of the Rebellion by Frederick H. Dyer (Part 3)
      3. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XL, Part 1 (Serial Number 80), p. 230
      4. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XL, Part 2 (Serial Number 81), p. 550
      5. Volume 13 (Ordnance Returns for the Second Quarter, April-June, 1864); 17th Michigan Entry, Page 93; Summary Statements of Quarterly Returns of Ordnance and Ordnance Stores on Hand in Regular and Volunteer Army Organizations, 1862-1867, 1870-1876. (National Archives Microfilm Publication M1281, Roll 7); Records of the Office of the Chief of Ordnance, 1797-1969, Record Group 156; National Archives Building, Washington, D.C.
      6. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XL, Part 1 (Serial Number 80), p. 230
      7. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XL, Part 2 (Serial Number 81), p. 550
      8. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XL, Part 2 (Serial Number 81), p. 550
      9. Volume 13 (Ordnance Returns for the Second Quarter, April-June, 1864); 17th Michigan Entry, Page 93; Summary Statements of Quarterly Returns of Ordnance and Ordnance Stores on Hand in Regular and Volunteer Army Organizations, 1862-1867, 1870-1876. (National Archives Microfilm Publication M1281, Roll 7); Records of the Office of the Chief of Ordnance, 1797-1969, Record Group 156; National Archives Building, Washington, D.C.
      10. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XL, Part 1 (Serial Number 80), page 260
      11. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XL, Part 3 (Serial Number 82), page 735
      12. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XL, Part 3 (Serial Number 82), page 735
      13. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLII, Part 2 (Serial Number 88), page 617: “Organization of the Army of the Potomac…August 31, 1864”
      14. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLII, Part 1 (Serial Number 87), page 127: “Return of Casualties in the Union Forces (August 1864)”
      15. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLII, Part 2 (Serial Number 88), page 617: “Organization of the Army of the Potomac…August 31, 1864”
      16. Sommers, Richard J. “Grant’s Fifth Offensive at Petersburg: A Study in Strategy, Tactics, and Generalship.  The Battle of Poplar Spring Church, the First Battle of the Darbytown Road, the Second Battle of the Squirrel Level Road, the Second Battle of the Darbytown Road (Ulysses S. Grant, Virginia).” Doctoral Thesis. Rice University, 1970. Print. p. 1301.
      17. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLII, Part 1 (Serial Number 87), page 141: “Return of Casualties in the Union Forces (September-October 1864)”
      18. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLII, Part 3 (Serial Number 89), page 463: “Organization of the Union Forces” (October 31, 1864)”
      19. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLII, Part 1 (Serial Number 87), page 158: “Return of Casualties in the Union Forces…Boydton Plank Road, Va., October 27-28, 1864”
      20. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLII, Part 3 (Serial Number 89), page 463: “Organization of the Union Forces” (October 31, 1864)”
      21. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLII, Part 3 (Serial Number 89), page 1121: “Organization of the Union Forces” (December 31, 1864)
      22. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLII, Part 3 (Serial Number 89), page 1121: “Organization of the Union Forces” (December 31, 1864)
      23. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLVI, Part 2 (Serial Number 96), page 332: “Organization of the Union Forces” (January 31, 1865)
      24. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLVI, Part 2 (Serial Number 96), page 745: “Organization of the Union Forces” (February 28, 1865)
      25. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLVI, Part 2 (Serial Number 96), page 332: “Organization of the Union Forces” (January 31, 1865)
      26. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLVI, Part 2 (Serial Number 96), page 745: “Organization of the Union Forces” (February 28, 1865)
      27. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLVI, Part 1 (Serial Number 95), page 573: “Organization of the Union Forces” (March 31, 1865)
      28. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLVI, Part 1 (Serial Number 96), page 70: “Return of Casualties in the Union forces at Fort Stedman… (March 25, 1865)”
      29. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLVI, Part 1 (Serial Number 95), page 589: “Return of casualties in the Union Forces commanded by Lieut. Gen. Ulysses S. Grant, March 29-April 9, 1865”
      30. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLVI, Part 1 (Serial Number 95), page 573: “Organization of the Union Forces” (March 31, 1865)
      31. The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies, Volume XLVI, Part 1 (Serial Number 96), page 70: “Return of Casualties in the Union forces at Fort Stedman… (March 25, 1865)”
      32. A Compendium of the War of the Rebellion by Frederick H. Dyer (Part 3)

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