35th New York Infantry Regiment "Jefferson County Regiment"

The 35th New York Infantry Regiment lost 1 officer and 40 enlisted men killed or mortally wounded and 53 enlisted men to disease during the Civil War.

1861
	Organized at Elmira, N.Y.
June 11	Mustered in for two years Federal service under Colonel William C. Brown, Lieutenant Colonel Stephen L. Potter, and Major Newton B. Lord . Moved to Washington, D.C., via Williamsport, Harrisburg and Baltimore for duty in the Defenses of Washington, D. C.
July 27	Attached to Porter's Brigade, 2nd Division, Army of Northeast Virginia. Constructed abattis and lunette forts which would become Forts Tillinghast and Craig.
August 2	Colonel Brown and Lt. Colonel Potter resign
August 4	Attached to Hunter's Brigade, Division of the Potomac
August 27	Major Lord promoted to colonel, Captain Bradley Winslow of Company A promoted to lieutenant colonel and Captain John Todd of Company H promoted to major
September 27	Marched to Fall's Church
October	Camp at Taylor's Tavern on the Leesburg Turnpike. Attached to Wadsworth's Brigade, McDowell's Division, Army of the Potomac
1862
January	The regiment's rifles were replaced with Austrian rifles, Calibre .54
March	Attached to 2nd Brigade, King's 3rd Division, 1st Army Corps, Army of the Potomac
March 10-15	Advance on Manassas, Va.
March 16	At Upton's Hill
April 9-19	McDowell's advance on Falmouth, Va. attached to 2nd Brigade, King's Division, Dept. of the Rappahannock
April-May	Duty at Falmouth
May 25-29	McDowell's advance on Richmond
June 1-21	Operations against Jackson attached to 3rd Brigade, 1st Division, 3rd Corps, Pope's Army of Virginia
July	Duty at Falmouth
July 24-27	Reconnaissance to Orange Court House
August 2	Newton B. Lord promoted to colonel
August 9	Battle of Cedar Mountain
August 16- September 2	Pope's Campaign in Northern Virginia
August 21-23	Fords of the Rappahannock
August 28	Battles of Gainesville
August 29	Groveton
August 30	Bull Run The regiment lost 22 men killed or mortally wounded, 2 officers and 31 men wounded, and 28 men missing
September 6-22	Maryland Campaign. Attached to 3rd Brigade, 1st Division, 1st Army Corps, Army of the Potomac
September 14	South Mountain The regiment lost 3 men killed or mortally wounded, 9 men wounded and 1 man missing.
September 16-17	Antietam The regiment lost Captain James Barnett and 11 men killed or mortally wounded, Captain George Flower, 4 other officers and 46 men wounded, and 4 men missing.
September - October	Duty at Sharpsburg
October 30- November 19	Movement to Falmouth, Va.
December 12-15	Battle of Fredericksburg The regiment lost 7 men killed or mortally wounded, and 16 men wounded
1863
January 1	Major Todd promoted to lieutenant colonel, Captain David Evans of Company I promoted to major
January 20-24	"Mud March"
January	Assigned to Provost Marshal General Patrick's Command, Army of the Potomac
February-June	Provost duty at Aquia Creek
February 9	Colonel Lord, under arrest for cowardice, drunkeness and fraudulent expense reports, resigned his command. Lieutenant Colonel Todd promoted to colonel, Major Evans promoted to lieutenant colonel
February 22	Captain Sidney Mendall of Company G promoted to major
April 27-May 6	Chancellorsville Campaign
June 5	Mustered out, expiration of term under Colonel John G. Todd, Lt. Colonel Evans and Major Mendall. Three years men transferred to 80th New York Infantry.