Workers, lend your strength to the red triangle - Help the 'Y' help the fighters fight - United War Work Campaign - November 11 to 18" 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 visually connects the physical labor of the domestic worker with the frontline soldier, using the YMCA block as the literal bridge. The muscular depiction of the worker elevates his status to that of a hero.
Steal this when
You want to show how a mundane or domestic contribution directly impacts a grand, heroic outcome.