UNION NEW YORK VOLUNTEERS
12th Regiment, New York Infantry
Organized at Elmira, N. Y., and mustered in for two years' State service May 8, 1861. Mustered in for three months' United States service May 13, and remustered for full term of State service August 2, 1861. Moved to Washington, D. C., May 29, 1861. Attached to Richardson's Brigade, Tyler's Division, McDowell's Army of Northeast Virginia, June to August, 1861. Richardson's Brigade, Division of the Potomac, to October, 1861. Wadsworth's Brigade, McDowell's Division, Army of the Potomac, to March, 1862. Butterfield's 3rd Brigade, Porter's 1st Division, 3rd Army Corps, Army of the Potomac, to May, 1862. 3rd Brigade, 1st Division, 5th Army Corps, to May, 1863. Headquarters, 5th Army Corps, to June, 1864.
- Duty in the Defences of Washington, D. C., till July 16, 1861. Advance on Manassas, Va., July 16-21. Battle of Bull Run July 21. Upton's Hill August 27. Duty in the Defences of Washington, D. C., till March 10, 1862. Advance on Manassas, Va., March 10. Moved to the Virginia Peninsula March 22-24. Warwick Road April 5. Siege of Yorktown April 5-May 4. Before Yorktown April 11. Reconnoissance up the Pamunkey May 10. Reconnoissance to Hanover Court House May 26. Battle of Hanover Court House May 27. Operations about Hanover Court House May 27-29. Seven days before Richmond June 25-July 1. Battle of Gaines Mill July 27. White Oak Swamp and Turkey Bend June 30. Malvern Hill July 1. Duty at Harrison Landing till August 16. Movement to Fortress Monroe, thence to Centreville August 16-28. Pope's Campaign in Northern Virginia August 28-September 2. Battle of Bull Run August 30. Maryland Campaign September 6-22. Battle of Antietam September 16-17. Shepherdstown September 19. At Sharpsburg, Md., till October 30. Movement to Falmouth, Va., October 30-November 19. Battle of Fredericksburg, Va., December 12-15. Expedition to Richard's and Ellis' Fords December 29-30. "Mud March" January 20-24, 1863. At Falmouth till April. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5. Mustered out May 17, 1863, expiration of term Three years men consolidated to a Battalion of two Companies and assigned to duty as Provost Guard at Headquarters, 5th Army Corps, to June, 1864. Participating in the Gettysburg (Pa.) Campaign June 11-July 24, 1863. Battle of Gettysburg July 1-3. Bristoe Campaign October 9-22. Advance to line of the Rappahannock November 7-8. Mine Run Campaign November 26-December 2. Campaign from the Rapidan to the James May 3-June 2. Battles of the Wilderness May 5-7; Spottsylvania May 8-12; Spottsylvania Court House May 12-21; North Anna River May 23-26. On line of the Pamunkey May 26-28. Totopotomoy May 28-31. Transferred to 5th New York Infantry June 2, 1864, as Companies "E" and "F."
Regiment lost during service 3 Officers and 61 Enlisted men killed and mortally wounded and 1 Officer and 59 Enlisted men by disease. Total 124.
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