It was too much for the ironclads, slow and unwieldy, possessed of limited vision, and operating in a narrow and uncertain channel. In the course of the 2½-hour fight, only one came as close as 900 yards to Fort Sumter. To the 2,209 rounds hurled against them, the ironclads were able to return only 154, of which only 34 found the target. These breached and loosened the right flank parapet for a length of 25 feet and pocked the walls elsewhere with craters up to 2½ feet deep. But it was far from enough; Fort Sumter remained strong and secure. In the meantime, five of the ironclads were seriously disabled by the accurate fire, and one, the Keokuk, sank the following morning in the shallow water off Morris Island. In a daring exploit sometime later, Confederate troops recovered the guns of the Keokuk and mounted one at Fort Sumter.

Admiral Du Pont had “attempted to take the bull by the horns but had failed.” The North, so confident of victory, was stunned at a time when the general military situation gave cause for gloom. The war in the East had been bloody and indecisive till now; the news from the West was bad.

Federal authorities looked to a combined operation to seize Morris Island and from there demolish Fort Sumter. With Fort Sumter reduced, the harbor could be entered.

The Morris Island Approach to Fort Sumter

Folly Island and Cole’s Island, next south of Morris Island, had been occupied by Northern troops just prior to the naval attack. In June and July, the northern end of Folly Island was fortified. In a remarkable operation, 47 guns and mortars were secretly placed “within speaking distance of the enemy’s pickets.” Some 11,000 men were concentrated on the island. Brig. Gen. Quincy A. Gillmore, the “breacher” of Fort Pulaski, assumed command on June 12. Rear Adm. John A. Dahlgren superseded Admiral Du Pont on July 6.

Col. Alfred Rhett. From Johnson, The Defense of Charleston Harbor.

Bvt. Maj. Gen. Quincy A. Gillmore. From Johnson, The Defense of Charleston Harbor.

During that time the Confederates mounted guns at the southern end of Morris Island and built up the earthworks at its upper end—Battery Gregg at Cummings Point and Battery Wagner some 1,400 yards to the south. The latter work, commanding the island at its narrowest point, was made into a formidable “sand fort” mounting about 15 guns.