History 207 World War, 1939-1945 178 Naval operations 124 Naval strategy 67 Naval art and science 55 History, Naval 53 Naval operations, American 53 Submarine 50 Sea-power 49 Biography 36 Campaigns 34 Naval aviation 30 Naval history 30 Naval operations, British 30 Naval battles 26 Warships 23 Naval architecture 22 Naval operations, German 20 Aircraft carriers 19 Naval history, Modern 19 20th century 18 World war, 1939-1945 18 Admirals 17 Naval operations, Japanese 17 Naval tactics 17 World War 17 World War, 1914-1918 16 Great Britain 14 Military policy 14 Naval warfare 14