The Liao dynasty (Khitan: Mos Jælud; ), officially the Great Liao , also known as the Khitan Empire (Khitan: Mos diau-d kitai huldʒi gur; ) and the Liao Empire, was an empire in East Asia that ruled from 907 to 1125 over present-day Mongolia and portions of the Russian Far East, northern Korea, and northern China. The Liao dynasty was founded by Abaoji, Khagan of the Khitan people around the time of the collapse of Tang China. It was the first state to control all of Manchuria.