1st New York Cavalry Regiment

1st New York Cavalry Regiment
Unit name	1st New York Cavalry Regiment
Native name	"1st New York Mounted Rifles" (later)
Dates	July 1861 – July 1865
Country	United States
Allegiance	Union
Branch	United States Army
Type	Cavalry
Size	Regiment
Garrison	New York
Battles	American Civil War, Peninsula Campaign, Seven Days Battles, Second Battle of Bull Run, Battle of Gettysburg, Overland Campaign, Siege of Petersburg
Notable commanders	Col. George W. Cothran, Col. John Hammond

1st New York Cavalry Regiment was a Union cavalry regiment raised in New York during the American Civil War that served in multiple Eastern Theater campaigns from 1861 to 1865. Raised amid the call for volunteers after the Battle of Fort Sumter and the proclamation by Abraham Lincoln, the regiment saw mounted service with the Army of the Potomac and operated in reconnaissance, screening, raiding, and mounted combat roles. Its companies were engaged at major actions including the Peninsula Campaign, the Second Battle of Bull Run, and the Siege of Petersburg.

Formation and Early Service

Recruiting began in July 1861 under state authority in New York City and surrounding counties, following Federal mobilization after the fall of Fort Sumter and the Militia enrollment called by Edwin D. Morgan. Mustered into Federal service, the regiment initially served in the defenses of Washington, D.C. and performed scouting and patrols along the Upper Potomac River and approaches to the capital. Early assignments placed the regiment under brigade commanders attached to the I Corps and later under cavalry formations assigned to the Army of the Potomac during the Peninsula Campaign and Seven Days Battles.

Organization and Strength

The regiment was organized into companies A through M drawn from urban and rural districts of New York. Strength varied with recruitment, re-enlistments, and casualties; initial rolls approached regimental complement near 1,000 troopers, with mounted officers, non-commissioned officers, and enlisted men. The unit reported for duty in multiple brigades and divisions of the Union cavalry establishment, including service under brigadiers in the Department of the Potomac and attachments to the V Corps and VI Corps at different periods. Reorganization after heavy campaigning and attrition produced consolidated companies and periodic drafts from state authorities to refill ranks.

Major Engagements and Campaigns

The regiment participated in the Peninsula Campaign under George B. McClellan and saw action during the Seven Days Battles around Richmond. It fought mounted and dismounted at the Second Battle of Bull Run during the Northern Virginia Campaign and conducted reconnaissance before the Maryland Campaign that culminated in operations around the Battle of Antietam. Elements were present on screening and picket duty during the Battle of Fredericksburg and served in the cavalry battles that shaped the Gettysburg Campaign, arriving on the flanks and performing patrols in the aftermath of the Battle of Gettysburg. During the Overland Campaign, the regiment supported infantry assaults during Spotsylvania Court House and moved with the Army into the protracted operations of the Siege of Petersburg, taking part in raids, picket reliefs, and actions against Confederate cavalry under leaders such as J.E.B. Stuart and later Wade Hampton III.

Commanders and Notable Personnel

Commanding officers who led the regiment included George W. Cothran and John Hammond, each with prior militia or regular service before taking regimental command. Company commanders, staff officers, and non-commissioned leaders included veterans who later held posts in New York civic life and veterans’ organizations such as the Grand Army of the Republic. Individual troopers served alongside prominent Union cavalry leaders in corps and division-level commands, linking regiment history to figures like Philip Sheridan, Alfred Pleasonton, and H. Judson Kilpatrick through operational attachments.

Casualties and Losses

Across four years of campaigning the regiment sustained casualties from combat, wounds, disease, and accidents. Losses included killed in action at set-piece engagements and fatalities during raids and skirmishes; many more were wounded and convalesced in hospitals established by the United States Sanitary Commission and U.S. Army Medical Department. The regiment’s muster-out returns recorded men discharged for wounds, disease, or expiration of enlistment, and a number of officers brevetted for gallantry in late-war operations around Petersburg and during the final pursuit of Confederate forces leading to the Appomattox Campaign.

Uniforms, Equipment, and Cavalry Tactics

Troopers wore variations of Federal cavalry uniforms standard to Union mounted regiments, including dark blue tunics and sky-blue trousers with accoutrements issued by Quartermaster Department depots in New York City and Washington, D.C.. Arms included model carbines and Springfield or imported weapons common to cavalry units, sabers, single-shot pistols, and later repeating carbines when available. Tactically, the regiment performed traditional cavalry tasks: reconnaissance, screening for corps movements, raiding enemy supply lines during operations shadowing Robert E. Lee’s Army of Northern Virginia, mounted charges in suitable terrain, and dismounted skirmishing that matched evolving Union cavalry doctrine advocated by leaders like Philip Sheridan and George Stoneman.

Postwar Activities and Legacy

After mustering out in July 1865 the regiment’s veterans returned to New York where many joined veterans’ societies such as the Grand Army of the Republic and participated in memorialization efforts like monument dedications at battlefields including Gettysburg National Military Park and Petersburg National Battlefield. Regimental histories, compiled rosters, and veterans’ recollections contributed to Civil War scholarship preserved in New York Public Library collections and state archives; descendants and historical associations continue to preserve artifacts, flags, and personal papers that document the regiment’s service during the American Civil War era. Category:Units and formations of the Union Army from New York