First signs of Human activity in Dwarven records. Seemed to appear of the coast of Hemus Lake . If the records are to be believed, they formed out of the ichor that supposedly created the lake.
The war for Valus, when the forces of good in the world fought off an incursion from the lower planes. This great battle left a scar known as @the
The ancient Dwarves of Ichraya dug too deep and greedily into the westernmost part of the hrygnuum, and monsters and demons rose up, driving the dwarves out and seperating the dwarves of Ichraya from their homeland. This event seperated the Ichrae Mountains from the rest of the mountain range.
After their severing from the Dwarven kingdom of Ahmia, Ichrayan Dwarves chose to emigrate en mass to their homeland. As is clear to any who have met a dwarf, they never leave behind their roots, so very few chose to stay behind in the Ichraya Federation. Those Dwarves have since separated into their own subspecies of Ichrayan Dwarves.