4th United States Infantry

== Regimental History and Service Record ==
In California January, 1861. Ordered to Washington, D.C., and duty in the Defenses of that city until March, 1862. Attached to Sykes' Regular Infantry (Reserve) Brigade, Army of the Potomac, to May, 1862. 1st Brigade, 2nd Division, 5th Army Corps, Army Potomac, to August, 1863. Dept. of the East, to April, 1864. 1st Brigade, 1st Division, 9th Army Corps, to June, 1864. 1st Brigade, 2nd Division, 5th Army Corps, June, 1864. City Point, Va., Headquarters, Army Potomac, to May, 1865. Dept. of Virginia to July, 1865.
SERVICE.--
* Moved to Virginia Peninsula March, 1862. 
* March 17-September 2, 1862 - The Peninsula Campaign 
** April 5-May 4, 1862 - Siege of Yorktown, Virginia
** June 25-July 1, 1862 - The Seven Days Battles before Richmond, Virginia
*** June 26, 1862 - Engagement at Beaver Dam Creek, Virginia
*** June 27, 1862 - Engagement at Gaines's Mill, Virginia
*** June 30, 1862 - Engagement at Turkey Bridge, Virginia
*** July 1, 1862 - Engagement at Malvern Hill, Virginia
At Harrison's Landing until August 16. Movement to Fortress Monroe, thence to Centerville August 16-28. Pope's Campaign in Northern Virginia August 28-September 2. Battles of Groveton August 29; Bull Run August 30. 
* September 3-20, 1862 - The Maryland Campaign
** September 17, 1862 - Battle of Antietam, Maryland
** September 19, 1862 - Actions at Sharpsburg and Shepherdstown/Blackford's/Boteler's Fords, Maryland
* At Sharpsburg until October 29. 
* Kearneysville and Shepherdstown October 16-17.
* October 16-17, 1862 - Reconnoissance from Sharpsburg, Maryland to Smithfield, West VirginiaNot originally listed on unit homepage but referenced on Dyer summary
* Movement to Falmouth, Va., October 29-November 19.
* Battle of Fredericksburg, Va., December 12-15.
* "Mud March" January 20-24, 1863. 
* 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. 
* Moved to New York August 15. 
* Duty at Forts Tompkins and Wood until April 25, 1864. 
* ReJoined Army Potomac. 
* 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 10, 1864 - Combat at Ny River, Virginia
*** May 12, 1864 - Assault on the Salient at Spotsylvania Court House, VirginiaNot originally listed on unit homepage
** 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
*** June 1-3, 1864 - Battle of Bethesda Church, Virginia
Before Petersburg June 16-18. Ordered to City Point, Va., June 22, and assigned to duty at headquarters of the army under Gen. Grant until April, 1865. Fall of Petersburg April 2, 1865. Duty at Richmond, Va., until July, 1865. Moved to N.Y. Harbor July 15, 1865.
== Regimental Roster ==
== Regiment Statistical Information ==
* Regiment lost during service 2 Officers and 58 Enlisted men killed and mortally wounded and 1 Officer and 61 Enlisted men by disease. Total 122.
== Legacy ==
== Notes ==
== Sources == 
* Regulars - Reenacting Group
* (Pages 758, 759, 761, 828, 897, 902, 903, 904, 905, 916, 932, 933, 934, 935, 936, 938, 939, 940, 941, 1711)
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