That is correct. Before the War of the Ancients, the High Elves were all that existed on Kalimdor, amongst the various animal species. But it was the Highborn that went nuts, and when the Well of Eternity, or whatever, was destroyed, it turned the Highborne survivors into naga. Some of the High Elves fled to Lordaeron (north of the Eastern Kingdoms). Malfurion and his ilk became the Night Elves in Kalimdor, whereas the High Elves who became addicted to the Sunwell (many millennia later) became Blood Elves, in memory of all those that the trolls had slaughtered.Originally Posted by Swizzle
Well, my lore is a little rusty, so sorry if anything is incorrect. Can't remember if it was the trolls who hurt the pride of the High Elves or if it wasn't until the undead attacked under compulsion of the Lich King (Ner'zul).