Eldoret and the plateau around it had been occupied by the Sirikwa for several centuries prior to the era of Maasai ascendancy. Innovation in weaponry was introduced by the Maasai era of the late 18th and 19th centuries. With new weapons and forms of governance, they swept down from their original homelands in the north, closer to Lake Turkana, down to their present homelands south of Kenya. The Maasai clan that took over the Plateau were known as the Ilwasin Kishu, after whom it is presently named.