World War, 1939-1945 170 Naval operations 94 History 50 Naval operations, American 43 Submarine 41 Campaigns 31 Naval operations, British 23 Naval operations, German 18 Naval operations, Japanese 17 World war, 1939-1945 16 World War 15 Biography 13 Aerial operations 11 World War,1939-1945 10 Warships 9 Naval operation 7 Naval Operations 6 Pacific Ocean 6 Amphibious operations 4 Battleships 4 Kriegsmarine 4 Pacific Area 4 Personal narratives, American 4 Personal narratives, British 4 Submarine warfare 4 World War, 1914-1918 4 World war,1939-1945 4 Admirals 3 Aircraft carriers 3 Atlantic Ocean 3