Fitz John Porter
During the Civil War, the regiment was commanded by Colonel Fitz John Porter from May 1861 to January 1863. Porter spent little time in actual command of the regiment after its original organization, as he was promoted to brigadier general of volunteers in August 1861. Porter served as a division and corps commander in the Army of the Potomac until he was dismissed from service in January 1863. During Porter's absence, the regiment was commanded by Lieutenant Colonel James P. Sanderson. Porter was succeed as regimental commander by Colonel Oliver L. Shepherd who served as such from January 1863 to December 1870.