Campaigns World War, 1939-1945 441 History 240 Biography 69 World war, 1939-1945 64 World War, 1914-1918 44 History, Military 40 Regimental histories 38 Personal narratives, American 29 World War 27 Personal narratives 22 Western Front 22 Personal narratives, British 19 Soldiers 19 Military leadership 18 Naval operations 16 France 15 Pacific Area 14 United States 14 Aerial operations, British 13 Army 13 Generals 13 Tank warfare 13 Vietnam War, 1961-1975 13 Aerial operations 12 Armed Forces 12 Naval operations, American 12 Normandy 12 Eastern Front 11 Germany 11