15th Massachusetts Infantry

== Regimental History and Service Record ==
Organized at Worcester and mustered in June 12, 1861. Moved to Washington, D.C., August 8-11. Attached to German's Brigade, Stone's (Sedgwick's) Division, Army of the Potomac, to March, 1862. 1st Brigade, 2nd Division, 2nd Army Corps, Army of the Potomac, to July, 1864.
SERVICE.--At Camp Kalorama until August 25, 1861. March to Poolesville, Md., August 25-27. Picket and outpost duty on the Upper Potomac from Conrad's Ferry to Harrison's Island until October 20. Operations on the Potomac October 21-24. Battle of Ball's Bluff October 21. At Harper's Ferry and Bolivar Heights until March 7, 1862. At Charlestown until March 10. At Berryville until March 13. Movement toward Winchester and return to Bolivar Heights March 13-15. Moved to Fortress Monroe March 22-April 1. 
* April 1-September 2, 1862 - The Peninsula Campaign
** April 5-May 4, 1862 - Siege of Yorktown, Virginia
** May 31-June 1, 1862 - Battle of Seven Pines, Virginia 
** June 25-July 1, 1862 - The Seven Days Battles before Richmond, Virginia
*** June 29, 1862 - Battle of the Peach Orchard, Virginia 
*** 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
At Harrison's Landing until August 15. Movement to Alexandria August 15-28, and to Centreville August 29-30. Cover Pope's retreat August 31-September 1. 
* September 3-20, 1862 - The Maryland Campaign
** September 17, 1862 - Battle of Antietam, Maryland
Moved to Harper's Ferry September 22 and duty there until October 30. Movement to Falmouth, Va., October 30-November 20. Battle of Fredericksburg December 12-15. "Mud March" January 20-24, 1863. 
* April 27-May 6, 1863 - The Chancellorsville Campaign
Maryes Heights, Fredericksburg, May 3. Salem Heights May 3-4. Banks' Ford May 4. 
* June 11-August 1, 1863 - The Gettysburg CampaignNot originally referenced on unit homepage
** July 1-3, 1863 - Battle of Gettysburg, Pennsylvania
Advance from the Rappahannock to the Rapidan September 13-17. Bristoe Campaign October 9-22. Bristoe Station October 14. Advance to line of the Rappahannock November 7-8.
* Mine Run Campaign November 26-December 2.
* Robertson's Tavern or Locust Grove November 27.
* Morton's Ford February 6-7, 1864.
* Picketing Rapidan until May, 1864.
* 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 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-July 12. Jerusalem Plank Road June 22-23. Left the front July 12. Mustered out July 28, 1864. Veterans and Recruits transferred to 20th Massachusetts.
== Regimental Roster ==
== Regiment Statistical Information ==
Source 	Casualties	Remarks
Dyer 	
* 14 Officers and 227 enlisted men killed and mortally wounded 
* 1 Officer and 121 enlisted men killed by disease
* Total 363	None
Fox 	
* 14 Officers and 227 enlisted men killed and mortally wounded
* Total 241 (Combat Losses)
* Fox lists this unit as:
** 11th on the list of units "sustaining greatest loss in action" (Infantry units with over 200 casualties)
** 38th on the list of units with losses based on duration of the entire term of service of the unit (4th of the Massachusetts troops)	
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 761, 827, 897, 901, 902, 903, 904, 905, 916, 932, 933, 934, 935, 936, 937, 938, 939, 941, 1253)
* (Pages 3, 11)
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