3rd United States Infantry Regiment

The 3rd United States Infantry Regiment lost 2 officers and 39 enlisted men killed or mortally wounded and 48 enlisted men to disease during the Civil War.

1861
January	In Texas Headquarters and Companies B, D, G, H and K, at Fort Clark, Colonel Bonneville commanding Companies A, C and E, at Ringgold Barracks, Lieutenant-Colonel Electus Backus commanding Companies F and I at Fort McIntosh, Major C. C. Sibley commanding.
March	Companies C and E moved to Fort Hamilton, New York
March 19- April 25	Companies B, D, G, H and K to New York Companies C and E moved to Fort Pickens, Fla.
March 19	Headquarters and Companies B, D, G, H and K, under Brevet Major O. L. Shepherd (Colonel Bonneville on leave) ordered to evacuate Texas and left Fort Clark. The regiment had been instructed to detour around San Antonio due to "excitement among the citizens." But Major Shepherd called a council of the officers and it was decided to march through the town with “colors flying, band playing, and every man and officer as fine as brass and bullion could make him.”
April 7	Headquarters and Companies B, D, G, H and K arrived at Indianola and embarked for New York Harbor
April 16	Companies C and E arrived Fort Pickens, Fla. and duty there until June, 1862
April 25	Headquarters and Companies B, D, G, H and K arrive in New York
April 26	Companies A, F and I surrendered to an overwhelming force of Confederates under Colonel Van Dorn at Mattagorda Bay, Texas. The men and officers were paroled. Every enlisted man rejoined the regiment in 1862, in spite of offers of commissions in the Confederate service.
May 9	Companies B, D, G, H and K moved from Fort Hamilton, N.Y. Harbor, to Washington, D. C.
June	Ordered to General Patterson's Department of Pennsylvania. Moved by rail to Carlisle, Pa., and marched to and forded the Potomac near Williamsport. The regiment was then recalled to Washington, making a forced march of twenty hours out of twenty four.
July 4	Moved to Arlington Heights and attached to Porter's Brigade, Hunter's Division, McDowell's Army of Northeast Virginia
July 16-21	Advance on Manassas, Va. With two companies of the Second and one of the Eighth Infantry formed Battalion of Reglars under Major George Sykes.
July 21	Battle of Bull Run The regiment lost five men killed, 26 missing, and four wounded; also two officers wounded and taken prisoner.
August - March	Duty at Washington assigned to Porter's City Guard. The battalion encamped in Franklin Square. When reviewed by President Lincoln shortly after the battle, General McDowll told Lincoln, ‘Mr. President, there are the men who saved your army at Bull Run.’
October 9	Companies C and E - Action on Santa Rosa Island, Fla.
November 22-23	Companies C and E - Bombardment of Fort Pickens
1862
January 1	Companies C and E - Fort Barrancas
February	Companies F and I were paroled and exchanged and joined Regiment at Washington
May 9-12	Companies C and E - Fort Pickens The companies lost two men killed and seven wounded.
March	Regement assigned to Sykes' Regular Infantry, Reserve Brigade, Army Potomac and moved to the Virginia Peninsula
April 5-May 4	Siege of Yorktown
May	Assigned to 1st Brigade, 2nd Division, 5th Army Corps, Army Potomac
June, 1862	Companies C and E joined Regiment in Army of the Potomac
June 25-July 1	Seven days before Richmond
June 26	Battle of Mechanicsville
June 27	Gaines' Mill
June 30	Turkey Bridge
July 1	Malvern Hill
July-August	At Harrison's Landing
August 16-28	Moved to Fortress Monroe, then to Centerville
August 28-September 2	Pope's Campaign in Northern Virginia
August 29	Battle of Groveton
August 30	Bull Run
September 6-22	Maryland Campaign
September 16-17	Battle of Antietam
September 19-20	Shepherdstown Ford
September 21	At Sharpsburg
October 16-17	Kearneysville and Shepherdstown
October 29-November 19	Moved to Falmouth, Va.
December 12-15	Battle of Fredericksburg
1863
January 20-24	"Mud March"
April 27-May 6	Chancellorsville Campaign
May 1-5	Battle of Chancellorsville
June 11-July 24	Gettysburg Campaign
July 1-3	Battle of Gettysburg,
July 5-24	Pursuit of Lee
August 21-September 14	At New York City during draft disturbances attached to the Dept. of the East
October 9-22	Bristoe Campaign
November 7-8	Advance to line of the Rappahannock
November 26-December 2	Mine Run Campaign
December	Ordered to New York and duty at Forts Richmond, Hamilton and Columbus, N.Y. Harbor
1864
October	Ordered to Washington, D.C., and duty there attached to Defenses of Washington, D.C., 22nd Army Corps
1865
February	Ordered to City Point, Va., and duty at Headquarters, Army of the Potomac
April 2	Fall of Petersburg
May - October	Moved to Washington, D.C. and attached to Defenses of Washington, 22nd Corps
May 23	Grand Review