121st New York Infantry Regiment

The 121st New York Infantry lost 14 officers and 212 enlisted men killed and mortally wounded and 4 officers and 117 enlisted men to disease during the Civil War.

It is honored by a monument at Gettysburg.

1862
	Organized at Herkimer
August 23	Mustered in 39 officers and 946 enlisted men under Colonel Richard Franchot, Lt. Colonel Charles H. Clark and Major Egbert Olcott
August 30	Left State for Washington, D.C.
September 3	Arrived in Washington
September	Attached to 2nd Brigade, 1st Division, 6th Army Corps, Army of the Potomac
September 6-22	Maryland Campaign
September 25	Colonel Franchot resigned to resume his seat in Congress and replaced by Colonel Emory Upton
October	Duty at Sharpsburg, Md.
October 20	Second Lieutenant George W. Davis died of disease
October 30- November 19	Movement to Falmouth, Va.
November 9	First Lieutenant Angus Cameron died of disease
December 12-15	Battle of Fredericksburg The regiment lost 4 enlisted men killed and 12 wounded.
December 16	At Falmouth
1863
January 20-24	"Mud March"
February	At Falmouth
March 23	Lt. Colonel Clark discharged
April 27-May 6	Chancellorsville Campaign
April 10	Major Olcott promoted to lieutenant colonel
April 29-May 2	Operations at Franklin's Crossing
May 3	Battle of Maryes Heights, Fredericksburg The regiment lost 4 officers and 92 enlisted men killed or mortally wounded, 2 officers and 155 enlisted men wounded, and 2 officers and 21 enlisted men captured or missing. This was 62% of the men engaged, in a fifteen to twenty monute fight. Captain Nelson O. Wendell, First Lieutenant U. F. Doubleday and Second Lieutenant Frederick E. Ford were killed and Captain Thomas S. Arnold was mortally wounded, dying on May 18.
May 3-4	Salem Heights
May 4	Banks' Ford
June 14-July 24	Gettysburg Campaign
July 2-4	Battle of Gettysburg The regiment lost 2 enlisted men wounded
July 5-24	Pursuit of Lee to Manassas Gap, Va.
August	Duty on line of the Rappahannock and Rapidan
September 20	First Lieutenant A. Clark Rice died of disease
October 9-22	Bristoe Campaign
November 7-8	Advance to line of the Rappahannock
November 7	Rappahannock Station The regiment lost 7 enlisted men killed or mortally wounded and 1 officer and 17 enlisted men wounded. It captured almost 700 prisoners and 4 Confederate battle flags.
November 26- December 2	Mine Run Campaign
1864
May 3-June 15	Campaign from the Rapidan to the James
May 5-7	Battle of the Wilderness The regiment lost 21 enlisted men killed or mortally wounded, 1 officer and 30 enlisted men wounded, and 2 officers and 19 enlisted men missing or captured
May 8-12	Spottsylvania
May 12-21	Spottsylvania Court House The regiment lost 5 officers and 58 enlisted men killed or mortally wounded and 8 officers and 84 enlisted men wounded. Captains Charles A. Butts and John D. Fish, First Lieutenants Silas E. Pierce and Edward P. Johnson and Second Lieutenant Charles F. Pettengill were killed from May 10 -12
May 12	Assault on the Salient, "Bloody Angle"
May 23-26	North Anna River
May 26-28	On line of the Pamunkey
May 28-31	Totopotomoy
June 1-12	Cold Harbor The regiment lost 1 enlisted man killed and 6 wounded
June 17-18	Before Petersburg
June 17 - July 9	Siege of Petersburg
June 22-23	Jerusalem Plank Road The regiment lost 1 enlisted man killed and 8 wounded
July 4	Colonel Upton promoted to brigadier general
July 9-11	Moved to Washington, D.C.
July 11-12	Repulse of Early's attack on Fort Stevens and the Northern Defenses of Washington The regiment lost 5 enlisted men killed or mortally wounded, 1 officer and 18 enlisted men wounded, and 2 enlisted men captured or missing
July 14-23	Expedition to Snicker's Gap
August 7- November 28	Sheridan's Shenandoah Valley Campaign
August 16	Lt. Colonel Olcott promoted to colonel with rank to July 4
August 21-22	Near Charleston The regiment lost 2 enlisted men killed and 1 officer and 4 enlisted men wounded
September 19	Battle of Winchester The regiment lost 2 enlisted men killed and 1 officer and 12 enlisted men wounded
September 22	Fisher's Hill The regiment lost 5 enlisted men wounded
September 23-24	Mt. Jackson
October 19	Battle of Cedar Creek The regiment lost Captains Jonathan Burrell and John D. P. Douw, First Lieutenant William H. Tucker and 12 enlisted men killed or mortally wounded, 2 officers and 35 enlisted men wounded, and 5 enlisted men missing
October	Duty in the Shenandoah Valley
December 9-12	Moved to Petersburg, Va.
December 12	Siege of Petersburg
December 24	Captain James Oronkhite of Company E promoted to major
1865
February 5-7	Dabney's Mills, Hatcher's Run The regiment lost 4 enisted men wounded, 1 mortally
March	Second Lieutenant Samuel B. Kelley died of disease
March 25	Petersburg The regiment lost First Lieutenant Horatio N. Duro killed and 3 enlisted men wounded at Fort Fisher
March 28-April 9	Appomattox Campaign The regiment lost 1 officer and 24 enlisted men wounded in addition to the killed and mortally wounded men at Petersburg and Sailor's Creek
March 31	Captain Henry M. Galpin of Company A promoted to major
April 2	Assault on and fall of Petersburg The regiment lost 1 enlisted man killed
April 6	Sailor's Creek The regiment lost Captain Ten Eyck C. Howland, First Lieutenant John T. Morton and 6 enlisted men killed, captured two Confederate colors and several hundred prisoners
April 9	Appomattox Court House. Surrender of Lee and his army.
April 10	At Farmville and Burkesville. Lieutenant Colonel Olcott promoted to colonel
April 23-27	March to Danville
April 27	Captain John S. Kidder of Company I promoted to lieutenant colonel
May 24 - June 3	March to Richmond, then to Washington, D.C.
June 8	Corps Review
June 25	Mustered out under Colonel Olcott, Lieutenant Colonel Kidder. Veterans and Recruits transferred to 65th New York Infantry
July 4	The regiment paraded at the Little Falls, New York Fourth of July celebration bearing their seven captured Confederate colors, and were treated to a banquet by the citizens.