Military maneuvers 3 Parades & processions 3 Gas masks 2 Recruiting & enlistment 2 World War, 1939-1945 2 Air raid drills 1 Air shows 1 more ... Airplanes 1 Artillery 1 Automobile driver education 1 Bombs 1 Cavalry 1 Civil defense 1 Emergency medical services 1 Horses 1 Military education 1 Military inspections 1 Military mobilizations 1 Military personnel 1 Military service 1 Military uniforms 1 Militias 1 Photography 1 Pontoon bridges 1 Radiophones 1 Railroads 1 Scrap drives 1 Soldiers 1 Subway stations 1 Tanks (Military science) 1 War blackouts 1 Watchtowers 1 Women 1 less ...