1. Plan of the rebel works and armament at Yorktown Va. captured by the Army of the Potomac under Maj. Gen. G.B. McClellan, U.S.A. on May 4, 1862 Yale Public content 1862. 2002-06-25T04:00:00Z. 2020-08-03T14:13:13Z. Abbot, Henry L. Corps of Topographical Engineers?. English. Public. Yorktown (Va.).