History World War, 1939-1945 Campaigns 8 Equipment and supplies 7 World War, 1914-1918 5 Aerial operations, British 4 Aerial operations, American 3 Airplanes, Military 3 Armed Forces 3 Commando operations 3 Naval operations 3 Biography 2 Foreign relations 2 Great Britain 2 Insignia 2 Militarism 2 Military history, Modern 2 Military policy 2 Military uniforms 2 Military weapons 2 Naval operations, American 2 Personal narratives, American 2 Pictorial works 2 Psychological aspects 2 Regimental histories 2 Secret service 2 Social aspects 2 Uniforms 2 War 2 War and society 2