After being cast out of the material world at the end of the War of the Primordial Twins and the subsequent defeat of their deity, Urgash, the Demons established a foothold in the world during the Elder Wars, taking advantage of the general confusion and ignorance. Lurking in uninhabited places, they gathered their strength and grew in numbers, and launched their first great incursion in Ashan in 20 YSD; the event was known since as the Wars of Fire.