Until the last few months of the Civil War, Fort Fisher kept North Carolina's port of Wilmington open to blockade-runners supplying necessary goods to Confederate armies inland. By 1865, the supply line through Wilmington was the last remaining supply route open to Robert E. Lee's Army of Northern Virginia. When Ft. Fisher fell after a massive Federal amphibious assault on January 15, 1865, its defeat helped seal the fate of the Confederacy.