 Fort Corcoran itself served as the rallying point for several battered artillery units, filling the fort well beyond capacity.An informal report on July 29, 1861 indicated Corcoran had far more than its planned 12 guns and 180 artillerymen.The report listed "12 8-inch seacoast howitzers, seven 24-pounder barbette guns, two 12-pounder field guns, and two 24-pounder howitzers."