Be Patriotic sign your country's pledge to save the food" 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 uses personification (Columbia/Liberty) directly engaging the viewer with outstretched hands, making the abstract concept of 'country' feel like a personal, emotional appeal.
Steal this when
You are asking for a formal commitment (like signing a pledge or petition) and want to frame it as a duty to a higher ideal.