In the Mongol Empire, the darkhans were exempted from taxation, socage and requisitioning. Genghis Khan made those who helped his rise darkhans in 1206. The families of the darkhans played crucial roles later when the succession crisis occurred in Yuan dynasty and Ilkhanate. Abaqa Khan (1234–82) made an Indian Darkhan after he had led his mother and her team all the way from Central Asia to Persia safely. A wealthy merchant of Persia was made of Darkhan by Ghazan (1271–1304) for his service during the early defeat of the Ilkhan. In Russia, the Khans of the Golden Horde assigned important tasks to the Darkhan. A jarlig of Temür Qutlugh (ca. 1370–1399) authorized rights of the tarkhan of Crimea.