The Civil War in the East

12th New York Infantry Regiment "Onondaga Regiment" "Independence Guard"


The 12th New York Infantry Regiment lost 3 officers and 61 enlisted men killed or mortally wounded and 1 officer and 59 enlisted men to disease during the Civil War.



May 8

Organized at Elmira, N. Y, and mustered in for two years' State service unde Colonel Ezra L. Walrath, Lt. Colonel James L. Graham and Major John Louis

May 13

Mustered in for three months' United States service

May 29

Moved to Washington, D.C. via Harrisburg and Baltimore. Attached to Richardson's Brigade, Tyler's Division, McDowell's Army of Northeast Virginia for duty in the Defenses of Washington.

June 19

Lt. Colonel Graham resigned, Lt. Colonel Robert M. Richardson mustered in as replacement

July 10

Crossed the Potomac on Chain Bridge.

July 16

To Vienna

July 17

Through Germantown and to within four miles of Centreville

July 18

Blackburn's Ford

The regiment lst 7 enlisted men killed, 3 mortally wounded, 17 wounded and 7 missing.

Corporal James E. Cross of Company E earned the Medal of Honor for 'most distinguished gallantry in action' and Sergeant Charles F. Rand of Company K for 'great gallantry in action'

July 21

Battle of Bull Run; in reserve and suffered no loss

August 2

Remustered for full term of State service; Attached to Richardson's Brigade, Division of the Potoma

August 27

Upton's Hill; lost 1 enlisted man wounded


Duty in the Defenses of Washington, D. C.

September 20

Captain George W. Cole of Company H transferred to 3rd New York Cavalry Regiment

September 25

Colonel Walrath resigns


Attached to Wadsworth's Brigade, McDowell's Division, Army of the Potomac

October 21

Major John Louis accidentally killed at Washington

October 25

Captain Henry Barnum of Company I promoted to major


February 3

Consolidated into 5 companies: A,G,H,I and K. Company B was merged into H, C into K, D into I and K, E into A, and F into H; Company A was transferred to the 102nd New York. Henry A. Weeks commissioned colonel.


Attached to Butterfield's 3rd Brigade, Porter's 1st Division, 3rd Army Corps, Army of the Potomac

March 10

Advance on Manassas, Va.

March 22-24

Moved to the Virginia Peninsula

April 5

Warwick Road

April 5-May 4

Siege of Yorktown

April 11

Before Yorktown; no loss

May 10

Reconnaissance up the Pamunkey; Attached to 3rd Brigade, 1st Division, 5th Army Corps

May 26

Reconnaissance to Hanover Court House

May 27

Battle of Hanover Court House

The regiment lost 2 enlisted men wounded and 1 missing

May 27-29

Operations about Hanover Court House

June 25-July 1

Seven days before Richmond

5 officers and 104 enlisted men killed, 9 enlisted men mortally wounded; 3 offcers and 56 enlisted men missing

July 27

Battle of Gaines Mill

The regiment lost 2 oficers and 10 enlsted men killed, 9 enlisted men wounded

June 30

White Oak Swamp and Turkey Bend

July 1

Malvern Hill

The regiment lost 9 enlisted men killed and 3 wounded. Major Henry Barnum was severely wounded and captured, but recovered and was exchanged


Duty at Harrison's Landing

August 16-28

Movement to Fortress Monroe, thence to Centreville

August 22

Adjutant Silas Titus resigns to becom colonel of the 122nd New York Infantry Regiment

August 28-
September 2

Pope's Campaign in Northern Virginia

August 30

Second Battle of Bull Run
The regiment lost 17 enlisted men killed, 7 mortally wounded; Colonel Weeks, Captains Augustus Root and Henry Ryder, 3 other officers and 50 enlisted men wounded, and 1 officer and 62 enlisted men missing

September 6-22

Maryland Campaign

September 11

Major Barnum resigns to become colonel of the 149th New York.

September 16-17

Battle of Antietam

The regiment was in reserve and suffered no loss

September 19


The regiment lost 1 man wounded

September 22

Captain Augustus Root of Company K promoted to major


At Sharpsburg, Md.

October 30-
November 19

Movement to Falmouth, Va.

December 12-15

Battle of Fredericksburg

The regiment lost 1 officer and 1 enlisted man killed; 1 officer and 12 enlisted men wounded, 7 men missing

December 29-30

Expedition to Richard's and Ellis' Fords


January 20-24

"Mud March"


At Falmouth

February 6

Lt. Colonel Richardson resigns to become colonel of the 15th New York Cavalry Regiment and Major Root is promoted to lieutenant colonel

April 27-May 6

Chancellorsville Campaign

May 1-5

Battle of Chancellorsville; no loss

May 17

Mustered out, expiration of term.

Three years men consolidated to a Battalion of two companies (D and F) and assigned to duty as Provost Guard at Headquarters, 5th Army Corps under the command of Major Henry W. Ryder. Lt. Colonel Root musters out and becomes lieutenant colonel of the 15th New York Cavalry Regiment

June 11

Gettysburg Campaign

July 1-3

Battle of Gettysburg; no loss

October 9-22

Bristoe Campaign

November 7-8

Advance to line of the Rappahannock

November 26-
December 2

Mine Run Campaign


January 1

Captain Henry W. Ryder of Company E promoted to major

May 3-June 2

Campaign from the Rapidan to the James

May 5-7

Battle of the Wilderness

May 8-12


May 12-21

Spottsylvania Court House

May 23-26

North Anna River

May 26-28

On line of the Pamunkey

May 28-31


June 2

Transferred to 5th Veteran New York Infantry as Companies E and F.

About the Author • ©2015 Steve Hawks