World War, 1914-1918 History 1,591 Campaigns 1,165 Regimental histories 525 Causes 506 Politics and government 479 Guerre mondiale, 1914-1918 429 more ... Foreign relations 360 Soldiers 235 Naval operations 212 Diplomatic history 209 Peace 194 World War, 1939-1945 193 Influence 186 Territorial questions 161 Social aspects 137 History, Military 118 Social conditions 117 Aerial operations 116 Economic aspects 113 Histoire 105 Weltkrieg 98 Women 95 World politics 95 War 93 Hospitals 91 Reparations 85 Atrocities 82 Submarine 77 Secret service 71 less ...