What was the duration of the war that was in progress when the USS McAnn first served in the Atlantic Ocean?
USS McAnn USS "McAnn" (DE-179) was a "Cannon"-class destroyer escort built for the United States Navy during World War II. She served in the Atlantic Ocean and provided escort service against submarine and air attack for Navy vessels and convoys.
First Battle of Fort Fisher The First Battle of Fort Fisher was a naval siege in the American Civil War, when the Union tried to capture the fort guarding Wilmington, North Carolina, the South's last major Atlantic port. Led by Major General Benjamin Butler, it lasted from December 23–27, 1864.