 These demands included taxes to the Mongols in both money and labor, "incense, gold, silver, cinnabar, agarwood, sandalwood, ivory, tortoiseshell, pearls, rhinoceros horn, silk floss, and porcelain cups", and direct oversight from a Mongol-appointed "darughachi".In 1283, Khubilai Khan sent word to the Trần that he intended to send Yuan armies through Trần territory to attack the kingdom of Champa, with demands for provisions and other support to the Yuan army.In 1284 Kublai appointed his son Toghan () to conquer Champa.