 Throughout the remainder of the war, Fort Corcoran remained an important communications center for the entire Arlington Line system of defenses, eventually connecting to over 30 miles of telegraph wire at the time of Robert E. Lee's surrender.As originally designed, Fort Corcoran's planned 12-gun complement would have been manned by 180 artillerymen, and the fort's 576 yards of perimeter would have been guarded by 620 soldiers, for a total garrison of 800 men.The initial garrison was the 13th New York Volunteer Infantry, and the fort's 12 guns were manned by Company K of the 2nd Wisconsin Volunteer Infantry Regiment.