History 213 Navies 78 World War, 1939-1945 71 Biography 70 Navy 63 Thesis 63 Sea-power 48 Juvenile literature 40 Leadership 40 United States 37 Dissertations, Academic 36 History, Naval 30 Management 29 Naval operations 29 Warships 25 Campaigns 23 Foreign relations 23 Great Britain 21 Military policy 21 United States. Navy 21 Naval strategy 19 Officers 19 Admirals 18 Z1 18 Congresses 17 Regimental histories 17 Training of 17 English language 16 Naval operations, American 16 Armed Forces 15