That Army of Light thing is extremely scuffed.
Army of Light was the army consisting of all races that Old Man Anduin summoned for the last battle for the fate of the universe.
Also there the Lightbound Army of AU Draenor led by Yrel. It consists of orcs, draenei and ogres.
Also there is Arathi and Scarlet Crusade thing with secret Menethil.
Judging by how we have zero AU Draenor Army assets so far, that Army was either scrapped or forgotten.
Arathi's and Scarlet Crusade's abscence is also noticeable.
And it's certainly not the Army of Light Old Man Anduin had.
So what the fuck is THAT Army that Liadrin summoned? This is scuffed army of human male paladins (and some Lightforged draenei by the look of it).
Is that it? Is this THAT Army of Light? Did they just cut all expenses and downsized the real Army of Light to that degree??? Are we meant to just let other Armies of Light go?