Stamp 'Em Out!" war stamps poster
The pattern
This still is filed under War-bond ask.
Define
Money is requested as duty. The instrument is financial. The motive is belonging to the effort.
Mechanism
Civic purchase. The buyer is not shopping. They are enlisting with a wallet. Price is framed as participation.
Verdict
A public or communal instrument needs wide subscription and the stake is genuinely shared.
Why it works
Uses a literal visual pun on 'Stamp' to connect the act of buying war stamps with the physical, aggressive act of crushing the enemy. The grotesque depiction of the enemy makes the requested action deeply satisfying.
Steal this when
You can create a double-meaning out of the desired action that visualizes the ultimate benefit or defeat of an enemy.