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. USS McAnn:  She served in the Atlantic Ocean and provided escort service against submarine and air attack for Navy vessels and convoys. World War II: World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier.
1939 to 1945