Join the Army Air Service, be an American eagle" poster
The pattern
This still is filed under Recruiting duty offer.
Define
Join us, framed as who you become, not as a job listing.
Mechanism
Identity offer. The role is a self. Benefits are secondary to the person you will be after you say yes.
Verdict
We are recruiting into a hard, proud, or transforming role: service, craft, a company with a real culture.
Why it works
It personifies the nations as birds of prey, making the abstract geopolitical conflict visceral and mythic. The phrase 'Be an American eagle' flatters the recruit, offering them a chance to embody national strength and predatory dominance.
Steal this when
You want to frame a conflict as a heroic struggle between clear archetypes (good vs. evil, strength vs. aggression) to rally supporters.