[1] Colonel James R. Chamberlain, succeeded by Col. John McMahon, received authority, September 14, 1864, to recruit this regiment, with headquarters at Rochester, where it was organized and mustered in the service of the United States for one year, October 4, 5, 7, 10 and 22, 1864; except Company A, originally Company C, 183d Infantry, which was mustered in at Elmira September 24, 1864.

[1] The regiment was formed in upstate New York, drawing men from Monroe, Ontario, Livingston, Yates, and Steuben counties for one year of service.

Morris, Phelps and York; and K at Rochester, North Dansville, Conesus, Groveland, Torry, Milo, Avon and Middlesex.

The Appomattox campaign saw the regiment fight with its corps at White Oak ridge, Gravelly Run and Five Forks, when its casualties aggregated 45 killed and wounded.

The 188th New York also participated in the final assault on Petersburg and was present at Appomattox Station on April 9 when General Lee surrendered the Army of Northern Virginia.