105th New York Infantry in the American Civil War

Overview

The 105th New York Infantry (Three Years’ Service) was an infantry regiment organized in New York during the American Civil War. Known as the Le Roy or Rochester regiment, it was formed by the consolidation of two recruiting efforts from Rochester and Le Roy, drawing men from Cattaraugus, Genesee, Monroe, and Niagara counties. The regiment served in the Union Army, primarily in the Eastern Theater, and was mustered into federal service between November 1861 and March 1862 for a three-year term.

The 105th New York Infantry was attached to the Army of Virginia and later the Army of the Potomac, participating in several major campaigns and battles before being consolidated with the 94th New York Infantry in March 1863 due to reduced numbers.

Organization & Service

The 105th New York Infantry was organized on March 15, 1862, by merging two regiments then being recruited at Rochester (under Col. Howard Carroll) and Le Roy (under Col. James M. Fuller). The regiment was mustered into United States service from November 1861 through March 1862 for a three-year enlistment. It departed New York on April 4, 1862, and was stationed in Washington, D.C., for about a month.

Assigned to the 1st Brigade, 2nd Division, 3rd Corps of the Army of Virginia, the regiment saw its first combat at the Battle of Cedar Mountain in August 1862. Shortly after, it participated in General Pope’s Virginia campaign, including the Second Battle of Bull Run, where it suffered significant losses. In the Maryland Campaign under General McClellan, the regiment remained in the same brigade and division, now part of the 1st Corps under General Hooker. The 105th sustained slight losses at South Mountain and heavier casualties at Antietam, where Lieutenant Colonel Howard Carroll was mortally wounded. The regiment was also engaged at Fredericksburg in December 1862, again incurring notable losses.

By early 1863, the regiment’s numbers had been greatly reduced. In March 1863, it was consolidated into five companies (F, G, H, I, and K) and transferred to the 94th New York Infantry. The 105th New York Infantry ceased to exist as a separate regiment at that time.

Engagements & Campaigns

• Cedar Mountain (August 1862)
• Pope’s Virginia Campaign (August 1862)
• Second Battle of Bull Run (August 1862)
• Maryland Campaign (September 1862)
• South Mountain (September 1862)
• Antietam (September 1862)
• Fredericksburg (December 1862)

Casualties

• Killed and mortally wounded: 2 officers, 48 enlisted men
• Died of disease and other causes: 45 enlisted men
• Total deaths: 95

Casualty figures are based on official reports and regimental histories.

Field Officers & Commanders

• Colonel James M. Fuller
• Colonel Howard Carroll (mortally wounded at Antietam)
• Colonel John W. Shedd
• Lieutenant Colonel Henry L. Achilles
• Lieutenant Colonel Howard Carroll
• Lieutenant Colonel Richard Whiteside
• Major John W. Shedd
• Major Daniel A. Sharp

Regimental Roster

The full roster of the 105th New York Infantry (Three Years’ Service), including officers and enlisted men, is available on the regiment’s roster page. This resource provides names, ranks, and additional service details valuable for genealogical and historical research.

To view the complete roster, visit the 105th New York Infantry (Three Years’ Service) Roster page.

Sources & References

• Official Records of the Union and Confederate Armies, Series I, Vol. XII, Vol. XIX
• New York State Adjutant General’s Report
• Dyer, Frederick H. Compendium of the War of the Rebellion
• Fox, William F. Regimental Losses in the American Civil War
• The Union Army, Vol. 2, Federal Publishing Company, 1908