Guard the Supply Lines" poster
The pattern
This still is filed under Negative headline.
Define
The first line is a warning, a refusal, or a negated claim. Something the reader cannot skim as praise.
Mechanism
Pattern interrupt. A negative is harder to slide past than a compliment. The payload must arrive immediately after the stop.
Verdict
The category is full of sunny claims
Why it works
The image of endless trains carrying tanks emphasizes the massive scale and importance of the railroad in wartime. The short, punchy directives ('Head clear', 'Eyes open', 'Mouth shut') are easy to remember and command authority.
Steal this when
You need to issue clear, memorable safety or security instructions to workers.