World War, 1939-1945 History 706 Foreign relations 291 Campaigns 266 Aerial operations, British 193 Diplomatic history 192 Secret service 190 more ... Guerre mondiale, 1939-1945 179 Politics and government 118 Regimental histories 114 Naval operations, British 75 World War, 1914-1918 68 Causes 60 Social aspects 57 Cryptography 56 Prisoners of war 53 Military intelligence 52 Underground movements 52 Britain, Battle of, Great Britain, 1940 49 Aerial operations 47 Women 45 History, Military 42 Soldiers 41 Histoire 40 Influence 40 Diplomatic relations 39 Generals 37 History and criticism 35 Relations extérieures 35 Spies 35 less ...