I have run and played in several troops styled games. Once even in Traveller.

Works best with a large ship's crew one set of characters being command staff at the department level, another set at the action level (i.e. The away Team) then all the filler grunts these aren't assigned specifically but get picked up as play needs. Often favored grunts up to the second group as they gain a specific set of traits.

Not though couched in vaguely military term it works well with larger merchants as well.

Adventure 4 Leviathan is a good place to start....

Evyn