4th Connecticut Infantry Regiment

4th Connecticut Volunteer Infantry
Active	May 21, 1861 to January 2, 1862
Country	United States
Allegiance	Union
Branch	Infantry

The 4th Connecticut Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.

The 4th Connecticut Infantry was organized at Hartford, Connecticut and mustered in on May 21, 1861.

The regiment was attached to Abercrombie's 6th Brigade, 2nd Division, Department of Pennsylvania, to August 1861. 2nd Brigade, Banks' Division, Army of the Potomac, to December 1861. Defenses of Washington to January 1862.

The 4th Connecticut Infantry ceased to exist when its designation was changed to 1st Connecticut Heavy Artillery on January 2, 1862.

Left Connecticut for Washington, D.C., June 10. Duty at Chambersburg, Pennsylvania, and at Hagerstown, Maryland, until July 4, 1861, and at Williamsport until August 16. At Frederick, Md., until September 5. Moved to Darnestown September 5, then to Fort Richardson. Service in the Defenses of Washington, D.C., and duty there until January 1862.

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