40th New York Infantry

== Regimental History and Service Record ==
* "Mozart Regiment"
* "Constitution Guard"
Organized at Yonkers, N.Y., June 27, 1861. Left State for Washington, D.C., July 4, 1861. Duty near Alexandria until August 4. Attached to Howard's Brigade, Division of the Potomac, to October, 1861. Sedgwick's Brigade, Heintzelman's Division, Army of the Potomac, to March, 1862. 2nd Brigade, 3rd Division, 3rd Army Corps, Army of the Potomac, to July, 1862. 2nd Brigade, 1st Division, 3rd Army Corps, to May, 1863. 3rd Brigade, 1st Division, 3rd Army Corps, to March, 1864. 1st Brigade, 3rd Division, 2nd Army Corps, to June, 1865.
SERVICE.--Duty in the Defenses of Washington, and on the Upper Potomac, until March, 1862. Operations on the Potomac October 21-24, 1861. Action at Ball's Bluff October 21. Advance on Manassas, Va., March 10-15, 1862. 
* Ordered to the Peninsula, Va., March 17. 
* March 17-September 2, 1862 - The Peninsula Campaign 
** April 5-May 4, 1862 - Siege of Yorktown, Virginia
** May 5, 1862 - Battle of Williamsburg, Virginia
** May 31-June 1, 1862 - Battle of Seven Pines, Virginia 
** June 25-July 1, 1862 - The Seven Days Battles before Richmond, Virginia
*** June 25, 1862 - Engagement at Oak Grove, Virginia
*** Jordan's Ford June 29;
*** June 29, 1862 - Engagement at Savage's Station, Virginia
*** June 30, 1862 - Engagement at White Oak Swamp, Virginia
*** June 30, 1862 - Engagement at Glendale, Virginia
*** July 1, 1862 - Engagement at Malvern Hill, Virginia
Turkey Bend July 3. At Harrison's Landing until August 16. Movement to Fortress Monroe, thence to Centreville August 16-26. Pope's Campaign in Northern Virginia August 26-September 2. Battles of Groveton August 29; Bull Run August 30; Chantilly September 1. Picket duty at Conrad's Ferry until October. Movement up the Potomac to Leesburg, thence to Falmouth, Va., October 11-November 19. Battle of Fredericksburg, Va., December 12-15. "Mud March" January 20-24, 1863. At Falmouth until April 27. 
* April 27-May 6, 1863 - The Chancellorsville Campaign
** May 1-5, 1863 - Battle of Chancellorsville, Virginia
* June 11-August 1, 1863 - The Gettysburg Campaign
** July 1-3, 1863 - Battle of Gettysburg, Pennsylvania
Pursuit of Lee July 5-24. Wapping Heights, Va., July 23. Duty on line of the Rappahannock until October. Bristoe Campaign October 9-22. Auburn and Bristoe October 13-14. Advance to line of the Rappahannock November 7-8. Kelly's Ford November 7. Mine Run Campaign November 26-December 2. Payne's Farm November 27. Mine Run November 28-30.
* Demonstration on the Rapidan February 6, 1864.
* Near Brandy Station until May.
* May 4-June 12, 1864 - The Overland Campaign
** May 5-7, 1864 - Battle of the Wilderness, Virginia
** May 8-21, 1864 - Battles of Spotsylvania Court House, Virginia
*** May 8, 1864 - Combat at Laurel Hill, Virginia
*** May 10, 1864 - Combat at Po River, Virginia
*** May 12, 1864 - Assault on the Salient at Spotsylvania Court House, Virginia
*** May 19, 1864 - Engagement at Harris Farm, Virginia
** May 22-26, 1864 - Operations on Line of the North Anna River, Virginia
** May 26-28, 1864 - Operations on Line of the Pamunkey River, Virginia
** May 28-31, 1864 - Operations on Line of the Totopotomoy River, Virginia
** June 1-12, 1864 - Battles of Cold Harbor, Virginia
Before Petersburg June 16-18. Siege of Petersburg June 16, 1864, to April 2, 1865. Jerusalem Plank Road June 21-23, 1864. Demonstration north of the James July 27-29. Deep Bottom July 27-28. Demonstration north of the James August 13-20. Strawberry Plains, Deep Bottom, August 14-18. Poplar Springs Church September 29-October 2. Boydton Plank Road, Hatcher's Run, October 27-28. Raid on Weldon Railroad December 7-12. Dabney's Mill, Hatcher's Run, February 5-7, 1865. Watkins' House March 25. Appomattox Campaign March 28-April 9. White Oak Road March 29-30. Crow's House March 31. Fall of Petersburg April 2. Sailor's Creek April 6. High Bridge and Farmville April 7. Appomattox Court House April 9. Surrender of Lee and his army. At Burkesville until May 2. March to Washington, D.C., May 2-15. Grand Review May 23. Mustered out June 27, 1865.
== Regimental Roster ==
== Regiment Statistical Information ==
Source 	Casualties	Remarks
Dyer 	
* 10 Officers and 228 enlisted men killed and mortally wounded 
* 170 enlisted men killed by disease
* Total 410	None
Fox 	
* 9 Officers and 229 enlisted men killed and mortally wounded
* Total 238 (Combat Losses)
* Fox lists this unit as 14th on the list of units "sustaining greatest loss in action" (Infantry units with over 200 casualties)	
WotRWiki Statistics	
* troops killed
** Includes troops mortally wounded
** Includes troops killed by disease
** All others are troops killed in action or under special circumstances	
== Legacy ==
== Notes ==
== Sources == 
* (Pages 827, 897, 898, 901, 902, 903, 904, 905, 916, 932, 933, 934, 935, 936, 937, 938, 940, 941, 1418-1419)
* (Page 3)
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