Eat potatoes and save wheat
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
The poster uses extreme brevity and directness. By placing the message inside dynamic, pointing shapes, it implies action and direction without needing extra words.
Steal this when
You need to communicate a single, extremely simple behavioral change to a broad audience.