Food will win this war. Official pictures of the United States Food Administration are shown at this theatre" poster
The pattern
This still is filed under Civilian war-duty equate.
Define
A civilian act (saving, making, staying quiet) is framed as the same duty as the front.
Mechanism
Moral equate. The small act inherits the gravity of the large one. The ask is ordinary. The meaning is not.
Verdict
We need mass compliance on an unglamorous behavior and can honestly tie it to a shared stake.
Why it works
Acts as point-of-entry signage to lend official government authority and patriotic appeal to a local cinema. It uses standard nationalistic symbols to validate the venue's content.
Steal this when
You need to associate local, everyday venues with a larger, official national effort or campaign.