"Minnesota" led a joint Army-Navy expedition, known as the Battle of Hatteras Inlet Batteries, against two important Confederate forts which had been erected at Hatteras Inlet, North Carolina. The squadron opened fire on Fort Clark on the morning of 28 August 1861, forcing the Confederate gunners to abandon the fort at noon. The following day, the fire of the squadron was concentrated on Fort Hatteras. The bombardment was so effective the Confederates were compelled to seek cover in bomb shelters and surrendered.