Let's get to work to make Americans strong, 1941 (United States. Extension Service)  

I gave a man! : will you give at least 10% of your pay in war bonds? (1942) (Treasury)  

Freshmen! sophomores!, (1942, US Bureau of Naval Personnel) 

Someone talked!  (1942, US Office of War Information)  

Strong in the strength of the Lord, (1942, US Office of War Information)