Czechoslovaks! Join. Our Free Colors!" 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 uses highly specific cultural and national symbols to speak directly to a niche immigrant demographic. It appeals to their desire for national self-determination, linking their old-world heritage to their new-world military service.
Steal this when
You are targeting a very specific subculture or demographic and want to use their ingroup symbols to create an immediate sense of belonging and duty.