They are giving all - Will you send them wheat?" 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
It leverages contrast and guilt. By juxtaposing the extreme danger and sacrifice of the soldiers in the visual with a simple question about food rationing, it makes the civilian's task feel minor but essential.
Steal this when
You want to persuade an audience to make a small concession by comparing it to a much larger effort or sacrifice being made by others for their benefit.