德玛瓦半岛
On July 23, 1862, Lockwood commandeered the Cessford estate at Eastville, Virginia (the former residence of the physician serving the Confederate defenders) for his headquarters. He used it intermittently throughout the war as he led the Union defenses at Point Lookout, Maryland (where the Potomac River enters Chesapeake Bay) and southward on the Delmarva Peninsula. Lockwood thus protected the crucial telegraph line from Hampton Roads across the Delmarva Peninsula to Annapolis, Baltimore and Washington.