The 11th United States Infantry Regiment lost 8 officers and 117 enlisted men killed or mortally wounded and 2 officers and 86 enlisted men to disease during the Civil War. It is honored by a monument at Gettysburg.

1861
May 4 Authorized by direction of the President
July 29 Confirmed by Act of Congress
August-September Organized at Fort Independence, Boston Harbor under Major DeLancey Floyd-Jones (USMA 1846)
October 10 1st Battalion ordered to Perryville, Md.
1862
March Ordered to Washington, D.C. Attached to Sykes’ Regular Infantry, Reserve Brigade, Army Potomac
March Moved to Virginia Peninsula
April 5-May 4 Siege of Yorktown
May Attached to 2nd Brigade, 2nd Division, 5th Army Corps
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 4 Major Floyd-Jones breveted lieutenant colonel for meritorious service in the Peninsula Campaign
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. Attached to 1st Brigade, 2nd Division, 5th Army Corps
September 16-17
Battle of Antietam

Commanded by

September 19-20 Shepherdstown Ford
October At Sharpsburg, Md.,
October 29-November 19 Movement to Falmouth, Va.
December 12-15
Battle of Fredericksburg
January 20-24 “Mud March”
1863
April 27-May 6 Chancellorsville Campaign
May 1-5
Battle of Chancellorsville
June 11-July 24 Gettysburg Campaign
July 1-3
Battle of Gettysburg

Major Floyd-Jones commanded six companies on the field (B, C, D, E, F & G). He was breveted colonel for gallant and meritorious service in the battle.

From the monument on Houck’s Ridge at Gettysburg:

July 2. Arrived in the morning with the Brigade and took position on the right of the Twelfth Corps. Afterwards moved to the left and at 5 p.m. the Brigade formed line on the right of Little Round Top and advanced across Plum Run and to the crest of the rocky wooded hill in front under a fire of sharpshooters on the left and faced to the left with the Wheatfield on the right and rear. The Confederates having opened fire on the right flank and advancing through the Wheatfield in the rear the Regiment with the Brigade was withdrawn under a heavy fire of musketry and artillery and formed in line at the right of Little Round Top.

July 3. Remained in same position.

Present 25 officers and 281 men. Casualties: killed 8 officers and 16 men; wounded 7 officers and 85 men; missing 9 men.

July 5-24 Pursuit of Lee
August 15 Major Floyd-Jones was promoted to lieutenant colonel and given command of the 19th United States Infantry Regiment.
August 21-September 14 On special duty at New York
October 9-22 Rejoined army, Bristoe Campaign
November 7-8 Advance to line of the Rappahannock
November 26-December 2 Mine Run Campaign
1864
March Attached to 4th Brigade, 1st Division, 5th Army Corps
April Attached to 1st Brigade, 1st Division, 5th Army Corps
May 4-June 12 Rapidan Campaign
May 5-7
Battle of the Wilderness
May 8-21
Battle of 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 Attached to 1st Brigade, 2nd Division, 5th Army Corps
June 1-3 Bethesda Church
June 16-18 Before Petersburg
June 16-
November 2
Siege of Petersburg
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 2 Moved to Fort Hamilton, N.Y. Harbor
November 18 To Baltimore, Md.
December 5 To Annapolis, Md. Duty at Camp Parole, Annapolis, Md. assigned to 8th Army Corps, Middle Department
1865
January 26 Ordered to City Point, Va., and camp near Gen. Grant’s Headquarters. Provost duty attached to Headquarters Army of the Potomac
May At Richmond. Va. attached to Dept. of Virginia until October