What if we combine both suggestions? Siege carried out when an employer stiffs us after we deliver said claimant (The one in need of rescue) When the castle falls the would-be King/Queen makes a plea for their life and freedom by way of a job offer--We've already given one hell of an audition by this point.

Also, glad to see this back from the old boards. Had a bit of a suggestion, if you're fine with us bouncing ideas off of you. What if the older an orc gets the darker green their skin turns? Just a small bit of character I remember reading somewhere else as lore, there could even be associated slang (Dark boys as veterans, 'ripe' being used to say something's matured.) Worth thinking about I think.