Campaigns World War, 1939-1945 421 History 236 Biography 67 World war, 1939-1945 59 World War, 1914-1918 49 History, Military 39 Regimental histories 35 Personal narratives, American 27 World War 26 Western Front 21 Personal narratives 20 Soldiers 19 Military leadership 18 Personal narratives, British 17 Naval operations 16 France 15 Aerial operations, British 14 Pacific Area 14 Army 13 United States 13 Generals 12 Naval operations, American 12 Normandy 12 Tank warfare 12 Vietnam War, 1961-1975 12 Aerial operations 11 Armed Forces 11 Eastern Front 11 Germany 11