The 14th United States Infantry Regiment lost 8 officers and 158 enlisted men killed or mortally wounded and 2 officers and 206 enlisted men to disease during the Civil War. It is referenced by three War Department markers at Antietam and honored by a monument at Gettysburg.

1861
May 4 Authorized by direction of the President
May 14 Lieutenant Colonel John F. Reynolds, Commandant of Cadets and Instructor at West Point, was given command of the regiment.
July 29 Confirmed by Act of Congress
Organized at Fort Trumbull, Conn.
August 26 Lt. Colonel Reynolds was promoted to brigadier general and given command of the 1st Brigade in the Pennsylvania Reserves Division.
October Moved to Perryville, Md., and duty there
1862
March Moved to Washington, D.C. Attached to Sykes’ Regular Infantry, Reserve Brigade, Army of the Potomac
March Moved to the Virginia Peninsula
April 5-May 4 Siege of Yorktown, Va.
May Attached to 1st Brigade, 2nd Division, 5th Army Corps, 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 Movement to Fortress Monroe, then to Centerville
August 28-September 2 Pope’s Campaign in Northern Virginia
August 29 Battle of Groveton
August 30
Second Battle of Bull Run
September 6-22 Maryland Campaign
September 16-17
Battle of Antietam

The First Battalion was commanded at the Battle of Antietam by Captain W. Harvey Brown, the Second Battaltion by Captain David B. McKibbon.

From the first of three War Department markers on the Antietam battlefield:

At 3 P.M. of the 17th the First Battalion, Fourteenth U.S. Infantry crossed the Antietam at the Middle Bridge and advanced on the Boonsboro Pike until it reached the point where the Bloody Lane enters the Pike (200 yards east of this), where the Battalion was posted on the left (south) of the Pike as a reserve to the 4th U.S. Infantry.

At dusk Companies F and G deployed as skirmishers, advanced to this lane, formed on the right of the Second and Tenth U.S. Infantry, and engaged the Confederate skirmishers in the edge of the cornfield in front.

The Battalion was withdrawn at dark and recrossed the Antietam.

From the second marker:

At 3 P.M. the First Battalion, Fourteenth U. S. Infantry, crossed the Antietam at the Middle Bridge, advanced on this road to this point and formed on the hill and in the ravine south of this tablet, the right of the Battalion resting on this road. At dusk, Companies F and G, deployed as skirmishers, advanced about 200 yards to Sherrick’s Lane, formed on the right of the Second and Tenth U.S. Infantry, and engaged the enemy.

The Battalion was withdrawn at dark and recrossed the Antietam.

From the third marker:

On September 16, the Second Battalion, Fourteenth U.S. Infantry was in line on the east base of the ridge beyond the Antietam, in which position it remained until about 1 P.M. of the 17th when it crossed the Middle Bridge to support the Horse Batteries.

Late in the afternoon it advanced beyond the Batteries, moving in echelon on the right of the Fourth U.S. Infantry, and occupied this line covering Piper’s Lane and its approaches on the right with skirmishers thrown forward to the crest of the hill to the west.

It was withdrawn, about sunset, and recrossed the Antietam, where it remained in its original position until the morning of the 19th.

September 19-20 Shepherdstown Ford
September 21 At Sharpsburg, Md.
October 16-17 Kearneysville and Shepherdstown
October 29-November 19 Movement to Falmouth
November 3 Snicker’s Gap
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

From the monument on Houck’s Ridge at Gettysburg:

Eight Companies
Captain Crotius R. Giddings, Commanding

July 2. Arrived in the morning and took position with the Brigade and Division near the Twelfth Corps on the right. Moved with the Division from the right to the left of the line and at 5 P. M. with the Brigade moved across Plum Run near Little Round Top and supported the Second Brigade in its advance to the crest of the rocky wooded hill beyond and facing left engaged the Confederates but retired under heavy fire on both flanks and from the rear after the Confederates had possession of the Wheatfield in the rear of the Brigade and went into position on Little Round Top.

July 3. Remained in same position.

July 4. The Regiment with the 12th supported the 3d4th and 6th U. S. Infantry in a reconnaissance and developed a force of the Confederate infantry and artillery in front.

Casualties Killed 16 Men Wounded 2 Officers and 106 Men Missing 4 Men

July 5-24 Pursuit of Lee
August 13-16 Moved to New York
August 17- September 14 Duty in New York
September 24 Rejoined army at Culpeper, Va.
October 9-22 Bristoe Campaign
November 7-8 Advance to line of the Rappahannock
November 26-December 2 Mine Run Campaign
May 4-June 12 Rapidan Campaign
1864
March Attached to 4th Brigade, 1st Division, 5th Army Corps
April Attached to 1st Brigade, 1st Division, 5th Army Corps
May 5-7
Battle of the Wilderness
May 8-21
Spotsylvania Court House
May 22-26 North Anna River
May 26-28 On line of the Pamunkey
May 28-31 Totopotomoy
June 1-12 Cold Harbor
June 1-3 Bethesda Church
June 16-18 Fist Assault on Petersburg
June 16 – November 2 Siege of Petersburg. Attached to 1st Brigade, 1st Division, 5th Army Corps
July 30 Mine Explosion, Petersburg (Reserve)
August 18-21 Weldon Railroad
September 29-October 2 Poplar Springs Church, Peeble’s Farm
October 27-28 Boydton Plank Road, Hatcher’s Run
November 1 Ordered to New York, thence to Elmira, N.Y. Assigned to Dept. of the East.
1865
March Ordered to the field
April 4 Arrived City Point, Va. Attached to Provost Guard, Army of the Potomac.
May At Richmond, Va.