1st Connecticut Infantry Regiment

The 1st Connecticut Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.

Service
The 1st Connecticut Infantry was organized at New Haven, Connecticut and mustered in for three-months service on April 22, 1861 under the command of Colonel Daniel Tyler.

The regiment was attached to Mansfield's command, Department of Washington, to June 1861. Key's 1st Brigade, Tyler's Division, McDowell's Army of Northeastern Virginia to August 1861.

The 1st Connecticut Infantry mustered out of service on July 31, 1861.

Detailed service
Left Connecticut for Washington, D.C., May 18. Duty at Camp Corcoran, defenses of Washington, D.C., until June 1. Advanced to Vienna and Falls Church, Va., June 1-8, and picket duty there until July 16. Advanced on Manassas, Va., July 16-21. Occupation of Fairfax Court House July 17. Battle of Bull Run July 21.

Commanders

 * Colonel Daniel Tyler
 * Lieutenant Colonel John Speidel