Battles of Charleston Harbor

The First Battle of Charleston Harbor was an engagement near Charleston, South Carolina that took place April 7, 1863, during the American Civil War. The striking force was a fleet of nine ironclad warships of the Union Navy, including seven monitors that were improved versions of the original USS Monitor. A Union Army contingent associated with the attack took no active part in the battle. The ships, under command of Rear Admiral Samuel Francis Du Pont, attacked the Confederate defenses near the entrance to Charleston Harbor. Navy Department officials in Washington hoped for a stunning success that would validate a new form of warfare, with armored warships mounting heavy guns reducing traditional forts.
Du Pont had been given seven of the Passaic class monitors, the powerful New Ironsides, and the experimental ironclad Keokuk. Other naval operations were sidetracked as their resources were diverted to the attack on Charleston. After a long period of preparation, conditions of tide and visibility allowed the attack to proceed. The slow monitors got into position rather late in the afternoon, and when the tide turned, Du Pont had to suspend the operation. Firing had occupied less than two hours, and the ships had been unable to penetrate even the first line of harbor defense. The fleet retired with one in a sinking condition and most of the others damaged. One sailor in the fleet was killed and twenty-one were wounded, while five Confederate soldiers were killed and eight wounded. After consulting with his captains, Du Pont concluded that his fleet had little chance to succeed. He therefore declined to renew the battle the next morning.

The Second Battle of Charleston Harbor, also known as the siege of Charleston Harbor, siege of Fort Wagner, or Battle of Morris Island, took place during the American Civil War in the late summer of 1863 between a combined U.S. Army/Navy force and the Confederate defenses of Charleston, South Carolina.
Fort Wagner had withstood 60 days of constant bombing and held off a much larger Union army. Yet the Union army and navy had captured an important position at the mouth of Charleston Harbor and reduced its most formidable fortress to rubble. Despite this, the city of Charleston and Fort Sumter itself would remain in Confederate control until William T. Sherman's armies marched through South Carolina in 1865.
https://en.wikipedia.org/wiki/First_Battle_of_Charleston_Harbor