The Hun - His mark - Blot it out with Liberty Bonds" 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
The bloody handprint acts as a visceral, horrifying symbol of enemy atrocities, making the abstract concept of war tangible. The call to action is positioned as a direct counter-measure to this specific horror.
Steal this when
You want to use a stark, universal symbol of a problem that the audience can actively erase or counter with their purchase.