There is a Legacy version here.

Troop

Source NPC Core pg. 238
A troop is an organized collection of component creatures, typically Small or Medium in size, working as a cohesive whole. Over the course of enough attacks and downed comrades, troops shrink in size. A troop typically has the troop defenses and troop movement abilities, and most troops have weaknesses to area damage and splash damage. Because they consist of multiple discrete creatures, they can't be summoned.