The following is taken from New York in the War of the Rebellion, 27th ed. Frederick Phisterer. Albany: J. B. Lyon Company, 1912.

This battery was recruited and organized at Buffalo, and there mustered m the service of the United States for three years December 17, 1862. Commanded by Capt. John B. Eaton, it left the State December 22, 1862; served in the defenses of Washington, D. C., and the Artillery Camp of Instruction, 22d Corps, from December, 1862; at Philadelphia, Pa., and in the Department of Susquehanna, from July, 1863; at and near Washington, D. C., 22d Corps, from January, 1864; with the Artillery Reserve, 9th Corps, from April, 1864; at Washington, D. C, from May 16, 1864; in 1st Division, 9th Corps, Army of the Potomac, from June 5, 1864; and in the Artillery Brigade, 9th Corps, from July 30, 1864. The battery, commanded by Captain Eaton, was honorably discharged and mustered out June 22, 1865, at Fort Porter, Buffalo, having, during its service, lost by death of wounds received in action, 2 enlisted men; of disease and other causes, 17 enlisted men; total, 19.

The following is taken from The Union army: a history of military affairs in the loyal states, 1861-65 -- records of the regiments in the Union army -- cyclopedia of battles -- memoirs of commanders and soldiers, Volume II: New York, Maryland, West Virginia and Ohio. Madison, WI: Federal Pub. Co., 1908.

Twenty-seventh Independent Battery.—Capt., John B. Eaton. This battery, the "Buffalo Light Artillery," was raised and organized at Buffalo, where it was mustered into the U. S. service for three years on Dec. 17, 1862. It performed garrison duty at Washington until the spring of 1864, save for a period in 1863 when it was ordered to Philadelphia at the time of Lee's invasion of Pennsylvania. In 1864 it fought with the 9th corps, at the Wilderness, Spottsylvania, first assault on the works of Petersburg, and at the mine explosion. It was again active at Fort Stedman in March, 1865, and in the final assault on Petersburg. Commanded by Capt. Eaton, it was mustered out at Fort Porter, Buffalo, June 22, 1865, having lost during service 2 men mortally wounded, 5 men wounded, 2 missing, and 17 who died of disease, etc.