Crop from a map of the Third Battle of Winchester in the American Civil War. The battle occurred on September 19, 1864, and was a Union victory. The battle started with Union cavalry attacks from the east and north. This map shows the Union VI Corps infantry in position before it attacked.  Brigades are facing west toward Winchester. (Map is NOT oriented traditionally with north at the top.)
Bvt. Lt. Col. G. L. Gillespie, Major of Engineers, U.S.A. under the authority of the Secretary of War
This is a portion of an 1873 map titled "Battle field of Winchester, Va. (Opequon) [September 19, 1864]" prepared by an order of Lt. Gen. P.H. Sheridan under the authority of the United States Secretary of War. The entire map can be found in the Library of Congress <a rel="nofollow" class="external text" href="https://www.loc.gov/item/99446372/">map</a>, and shows the battlefield.