The Union Navy's failed ironclad assault on Charleston Harbor demonstrated the limits of monitors against fortified coastal defenses.
Key Facts
- Union ironclads engaged
- 9 ships
- Duration of firing
- Less than 2 hours
- Union casualties
- 1 killed, 21 wounded
- Confederate casualties
- 5 killed, 8 wounded
- Ships sunk or damaged
- 1 sinking, most others damaged
By the Numbers
Location
Cause → Event → Consequence
The U.S. Navy Department sought to validate ironclad warship technology by using a fleet of monitors and armored vessels to reduce Confederate forts at Charleston Harbor's entrance, diverting naval resources from other operations to mount the assault.
On April 7, 1863, nine Union ironclads under Rear Admiral Samuel Francis Du Pont attacked Confederate defenses at the entrance to Charleston Harbor. Delayed by tides, the fleet fired for less than two hours before Du Pont suspended the operation when the tide turned, unable to breach even the first line of defense.
The fleet withdrew with one vessel sinking and most others damaged. Du Pont consulted his captains and declined to renew the battle the following morning, marking a clear Union failure and revealing that ironclad monitors could not easily overcome well-positioned shore fortifications.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Rear Admiral Samuel Francis Du Pont.
Side B
1 belligerent