Mongols were forbidden from crossing into another Mongol leagues. Periods of Chinese rule were interspersed with rule by Turkic, Mongol and Tibetan peoples. As with all parts of the Mongol Empire, Goryeo provided eunuchs to the Mongols. They married with Mongol and Manchu women. Mongolian wrestling is the most popular of all Mongol sports. It then came under the Mongol and Manchu rule. Ruthenian principalities became vassals of the Mongol Empire. Isma'ili ruler of Alamut before the Mongol conquest. There is evidence that Timur tried to preserve his Mongol roots. They were later absorbed by the Mongol Yuan dynasty. This headdress combined Mongol and Chinese practices of adornment. This institution was established to supervise the administration of Tibet and the Mongol lands. In 1234 they succumbed to combined Mongol and Song dynasty forces. It remained part of the Chagatai Khanate (one of four Mongol successor realms) until 1370. Empress Chabi exemplified the high role of women in Mongol culture.