Normally the term battalion is not associated with a volunteer regiment. However, the 77th New York State Volunteers was originally mustered into federal service on November 23, 1861 for a term of three years. Upon the expiration of the terms of enlistment, the regiment's men eligible for discharge were sent to Saratoga where they were mustered out on December 13, 1864. The remaining men were subsequently designated a battalion and were referred to as such until they were mustered out on June 27, 1865 at Washington (see Phisterer, New York in the War of the Rebellion, Vol. 4, pp. 2813-2814).
From the description of Quartermaster's abstracts of articles expended, lost, or destroyed in the public service, 1865. (New York State Archives). WorldCat record id: 83528880
