Other
Defense industry
3
Economic & industrial aspects
Women
World War, 1939-1945
Employment
2
Adult education
1
Air bases
1
Air pilots
1
Aircraft
1
Aircraft industry
1
Boat & ship industry
1
Bombs
1
Defense industry strikes
1
Education
1
Engineering
1
Lathes
1
Machine guns
1
Machine shops
1
Military parades & ceremonies
1
Naval operations
1
Naval yards & naval stations
1
Ordnance industry
1
Railroad freight cars
1
Ships
1
Tanks (Military science)
1
Vocational education
1
War rallies
1
World War, 1914-1918
1