World War II Sea War, Vol 9: Wolfpacks MuzzledThis volume covers day to day naval actions during March June 1943. The Allies attacked German U boats day and night, forcing their withdrawal from the vital North Atlantic convoy routes, clearing the way for the eventual invasion of Europe from Britain. In the Bismarck Sea, Allied aircraft destroyed an entire Japanese troop convoy bound for New Guinea. In the Komandorski Islands, the U. S. Navy engaged a superior Japanese force and out fought them.