President Wilson's message to the boys of Pennsylvania, United States Boys' Working Reserve
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
Uses the highest possible authority (the President) to elevate a menial task (temporary labor) to a 'high privilege' and 'patriotic duty' on par with fighting in the trenches.
Steal this when
When you need to confer prestige on a low-status role by using an endorsement from a high-status leader.