The Jap Knows! Let's beat our quotas" poster
The pattern
This still is filed under Us-versus-them positioning.
Define
The buyer is invited into a side. The product is what we use. The named other is what we refuse.
Mechanism
Identity contrast. Choosing the offer is choosing a group. The out-group does as much work as the claim.
Verdict
The category is crowded
Why it works
Leverages wartime xenophobia and employee participation (the poster was drawn by a fellow employee) to create a localized, relatable call to action.
Steal this when
You want to engage employees by featuring user-generated content from within their own ranks.