(I) 3rd Michigan Infantry

== Regimental History and Service Record ==
* Organized at Grand Rapids, Mich., and mustered into State service May 21, 1861
* Mustered into United States service June 10, 1861
* Left State for Washington, D.C., June 13
* Attached to Department of Northeastern Virginia / 1st Division (Tyler) / 4th Brigade (Richardson), Brigaded with:
** 1st Massachusetts Infantry
** (I) 12th New York Infantry
** 2nd Michigan Infantry
** 1st United States Artillery / Battery G
* Richardson's Brigade, Division of the Potomac, to October, 1861, Richardson's Brigade, Heintzelman's Division, Army of the Potomac, to March, 1862
* 3rd Brigade, 3rd Division, 3rd Army Corps, Army of the Potomac, to August, 1862
* 3rd Brigade, 1st Division, 3rd Army Corps, to March, 1864. 2nd Brigade, 3rd Division, 2nd Army Corps., to June, 1864.
SERVICE.--
* Duty in the Defenses of Washington, D.C., until July 16, 1861. 
* July 16-21, 1861 - The Manassas Campaign
** July 17, 1861 - Occupation of Fairfax Court House, Virginia
** July 18, 1861 - Skirmish at Blackburn's/McLean's/Mitchell's Fords, Virginia
** July 21, 1861 - Battle of Bull Run, Virginia
* Duty in the Defenses of Washington, D.C., until March, 1862. 
** August 28, 1861 - Skirmish at Bailey's Corners, Virginia
** August 30, 1861 - Skirmish at Bailey's Corners, Virginia
* Reconnaissance to Occoquan October 21-24, 1861. Reconnaissance to Occoquan Village February 3, 1862 (Cos. "H," "I"). 
* March 17-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 1-June 2, 1862 - Reconnaissance beyond Seven Pines, Virginia 
** June 25-July 1, 1862 - The Seven Days Battles before Richmond, Virginia
*** June 25, 1862 - Engagement at Oak Grove, Virginia
*** June 29, 1862 - Engagement at Savage's Station, Virginia
*** June 29, 1862 - Battle of the Peach Orchard, Virginia
*** June 30, 1862 - Engagement at Glendale, Virginia
*** July 1, 1862 - Engagement at Malvern Hill, Virginia
Duty at Harrison's Landing until August 15. Moved to Fortress Monroe, thence to Centreville August 16-27. Battles of Groveton August 29, Bull Run August 30, Chantilly September 1. Duty in the Defenses of Washington, D.C., until October 11. March up the Potomac to Leesburg, thence to Falmouth, Va., October 11-November 23. 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 to Manassas Gap July 5-24. Action at Wapping Heights July 23. Duty at New York and at Troy, N.Y., during the draft disturbances August 17-September 17. Bristoe Campaign October 9-22. Auburn October 3. Advance to line of the Rappahannock November 7-8. Kelly's Ford November 8. Mine Run Campaign November 26-December 2. Payne's Farm November 27.
* Demonstration on the Rapidan February 6-7, 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, VirginiaOriginally listed May 6, likely a clerical error
*** 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 1-9, 1864 - Battles of Cold Harbor, Virginia
* June 9, 1864 - Left front
* June 10, 1864 - Non-veterans mustered out of federal service
* June 13, 1864 - Veterans and Recruits transferred to 5th Michigan Infantry
== Regimental Roster ==
== Regiment Statistical Information ==
Source 	Casualties	Remarks
Dyer 	
* 4 Officers and 154 enlisted men killed and mortally wounded 
* 2 Officers and 89 enlisted men killed by disease
* Total 249	None
Fox 	
* Fox lists this unit as:
** 78th on the list of units with losses based on duration of the entire term of service of the unit (9th of the Michigan 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 272, 827, 894, 895, 897, 901, 902, 903, 904, 905, 916, 932, 933, 934, 935, 936, 937, 938, 939, 941, 1282)
* (Page 11)
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