Originally Posted by
Aquamonkey
Garithos was a Grand Marshal. He had an army. A commander in an army has subordinates. Unless Garithos was an army of one, there was someone next in the chain of command after him.
That's the point. Garithos had the support from the forces of Dalaran, Ironforge, Wildhammer, and Lordaeron despite his racist policies. They saw it first hand and still stood by him.
Also, they didn't survive even with him. Garithos got them all mind-controlled by the dreadlords. The only people who might have survived were those that deserted.
Yes, and that's fine. They didn't know at the time they sent forces. Not at fault. However, those dwarves found out once they got there. They saw it first hand and still supported Garithos. At fault.
That section is poorly written. Aside from it being tagged speculation and non-canon, as you quote, it says "it is known" and "we can see" they had troops there... Next sentence says "However, if those soldiers were there"... So it's not known that those troops were there.
"New Alliance" is only mentioned by that name in the non-canon RPG. Everywhere else, it is just referred to as "Alliance". This is in WC3, the TBC Townhall website, the Ultimate Visual Guide, and Annual 2015.