Remember December 7th full" 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 connects a recent, raw trauma (Pearl Harbor) to a revered historical text (Lincoln's Gettysburg Address). The somber image of the damaged flag at half-mast pairs with the quote to frame the war as a moral, almost sacred imperative to honor the dead.
Steal this when
You need to rally people by tying a current grievance, loss, or mission to deeply held shared values and historical precedent.