Reactivated on 7 October, the warship was assigned to Rear Admiral David Dixon Porter's North Atlantic Blockading Squadron and cruised off Wilmington, North Carolina through December. She then joined the rest of the squadron in the attack on Fort Fisher on 24–25 December, firing over 500 shells in the fierce bombardment. "Mohican" resumed her blockade, now off Beaufort, North Carolina, until the second attack on Fort Fisher from 13–15 January 1865. As part of the first line of battle, the sloop bombarded the Confederate bastion throughout the three-day campaign, supplying covering fire for the landings on the second and third days until the fort was taken on the 15th. During the engagement, "Mohican" lost one man killed and 10 wounded.