Mustered in by companies as the 50th Regiment of Infantry: August 26 to September 20, 1861 Designated 50th Regiment of Engineers: October 22, 1861. Mustered out by companies: June 13 - 14, 1865.
September 22, 1861; in the 3d Brigade, Fitz-John Porter's Division, from September 30, 1861; as engineers at Alexandria, Va., receiving instructions in engineering duties, from October 22, 1861; in the Volunteer Brigade of Engineers, Army of the Potomac, from March, 1862.
During its service the regiment lost by death, killed in action, 1 officer, 9 enlisted men; of wounds received in action, 7 enlisted men; of disease and other causes, 1 officer, 213 enlisted men; total, 2 officers, 229 enlisted men; aggregate, 231; of whom I enlisted man died in the hands of the enemy.
Among the disabled:
- George Tousan of Rensselaerville was an 18 year old Private of Company M who was discharged for his disability on October 11, 1864 at Petersburg, VA