What an nonsense. The winterscorn war happened because their corruption and transformation happened.
The fleshy vyrkul are older and never sleaped, the earthen and mechagnomes sleeped, the vyrkul not.
And the event with ymiron 15000 years ago was because soooo much humans were born, it was the end of the curse, not the beginningt
Tl:TR
Vyrkuls either way are much older then trolls.
Humans were in today lordaeron before the first troll ever born.
Even to read in chronicle 1