In-case this is a little confusing, Basically:
Alot of Squads fully equipped with WP Grenades or Full On Rare Weapons for entire squads are just grouped into other players with similar builds to prevent them from being used against the more historical players that might use less of the rare weapon or WP.
(Unsure if historically there was an entire unit like in-game say example like 12 people all with WP grenades in real life)
And by Semi-Historical I just mean player wise that are equipped and such.