Found George Shoop's enlistment record from the Civil War Soldiers and Sailors web site:
He enlisted in the 27th Independent Battery, New York Light Artillery on Dec. 8, 1862.
The info below is from their web site
27th Independent Battery, New York Light Artillery
Organized at Buffalo, N. Y., and mustered in December 17, 1862. Left State for Washington, D. C., December 22, 1862. Attached to Defences of Washington, D. C., and 22nd Army Corps, Dept. of Washington, to July, 1863. Philadelphia, Pa., Dept. of the Susquehanna, to January, 1864. Camp Barry, 22nd Army Corps, Dept. of Washington, D. C., to April, 1864. Artillery Reserve, 9th Army Corps, Army of the Potomae, to May 16, 1864. Defences of Washington, D. C., 22nd Army Corps, to June 5, 1864. Artillery, 1st Division, 9th Army Corps, Army of the Potomac, to July, 1864. Artillery Brigade, 9th Army Corps, to June, 1865.
SERVICE.-Duty at Artillery Camp of Instruction and in the Defences of Washington, D. C., till July, 1863. At Philadelphia, Pa., till January, 1864. At Washington, D. C., till April, 1864. Rapidan Campaign May, 1864. Battles of the Wilderness May 5-7; Spottsylvania May 8-12; Spotsylvania Court House May 12-16. At Washington, D. C., till June 5. Before Petersburg, Va., June 16-18. Siege of Petersburg, Va., June 16, 1864, to April 2, 1865. Mine Explosion, Petersburg, July 30, 1864. Fort Stedman March 25, 1865. Appomattox Campaign March 28-April 9. Assault and fall of Petersburg April 2. Pursuit of Lee April 3-9. Moved to Washington, D. C., April 21-27. Grand Review May 23. Mustered out June 22, 1865.
Battery lost during service 2 Enlisted men killed and mortally wounded and 17 Enlisted men by disease. Total 19.
