Kedun
Kedun was a fortified centre in the Tuul valley, on the northern frontier of the Liao empire. Chinese chronicles describe a Khitan town established on the site of an earlier Uighur settlement. In 1004 the Liao stationed twenty thousand cavalry in this region and assigned families of Bohai, Jurchen and Chinese origin to supply them. Earthen walls and archaeological remains in the valley recall the fortified settlements that guarded this frontier of the steppe.