Complete the following sentence: The American Civil War broke out in April 1861, and that year Howell reported aboard the steam frigate, which was assigned to the North Atlantic Blockading Squadron to take part in the Union blockade of the Confederate States of America. While aboard "Minnesota" he saw action in the
Battle of Hatteras Inlet Batteries on the Outer Banks of North Carolina on 28<unk>29 August 1861.