World War, 1914-1918 World War, 1939-1945 2 Air bases 1 Air pilots 1 Aircraft 1 Aircraft industry 1 Armed Forces 1 more ... Boat & ship industry 1 Buildings, structures, etc 1 Cancer 1 Canteens (Wartime, emergency, etc.) 1 Citizen participation 1 Crowds 1 Defense industry 1 Demonstrations 1 Economic & industrial aspects 1 Employment 1 Entertaining 1 Historic buildings 1 History 1 Hospitals 1 Hotels & taverns 1 Infants 1 Medical aspects 1 Medical care 1 Medical education 1 Medical equipment & supplies 1 Military life 1 Military parades & ceremonies 1 Naval operations 1 Naval yards & naval stations 1 Nursing 1 Officers 1 Operating rooms 1 Parades & processions 1 Poliomyelitis 1 Radiography 1 Ships 1 Sick children 1 Social aspects 1 less ...