Artist Unknown: Let’s Go! 1941. Sleek modern image in clean red, white and blue captures the enthusiasm that prevailed at the outset of war. The Air Corps was part of the Army throughout the war. However, the creation of the AAF, a separate arm in June 41 allowed the Corps more control of all aspects of military air as well as the autonomy to expand. Scarce. 40×30 near mint, conservation backed.