Population Migration / Travel
Starting around the year -2400 AC, elves from Ummuland, driven from their land by famine and excited by rumors of wealth in Adellon started to found small colonies in what would eventually become known as Ishi Plateau.
Using magic and total war tactics, both of which were practically unheard of on the continent, the elves quickly subdued the indigenous human populations, in effect genocide much of the human population north of The Kesh Forest. It is speculated that a third of humans were killed by war, plague, and starvation, a third were sold into slavery across Adellon and Ummuland, and the remaining third were almost exclusively Ropog and Yhivi, effectively erasing millennia of indigenous human culture.