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 <%UMR%%%>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.