>>96362829
If we assume hypothetically that the Crossing mission is canon, how do you think Garithos assembled all his forces?
https://warcraft.wiki.gg/wiki/Garithos%27_Elite_Guard

He already has the dwarves, and I'd assume he hired the trolls, goblins and ogres as mercenaries, but after that things get difficult.
He got all sorts of weird monsters from the Dalaran vaults, but how did he get red dragons to fight for him?
And where could he have found the centaurs if they are an entire continent away?
As for the Pandaren brewmaster that one is surprisingly plausible since we know pandaren wandered Azeroth even before the Mists lifted up.
The issue is where exactly would he have found those primal pandaren.