Güyük reversed several unpopular edicts of his mother the regent and made a surprisingly capable khan, appointing Eljigidei in Persia in preparation for an attack on Baghdad and the Ismailis and pursuing the war against the Song Dynasty. He was, nevertheless, insecure and won the disapproval of his subjects by executing several high-ranking officials of the previous regime for treason. The Seljuk princes struggled incessantly for the throne of the Sultanate of Rum. Despised by Izz-ad-Din, Rukn ad-Din Kilij Arslan IV came to Mongolia. Güyük ordered Rukn ad-Din enthroned in Iz-ad-Din Kaykaus II's place. A darughachi with 2,000 Mongol troops was sent to enforce this decision. When both David Narin and David Ulu summoned before Güyük in Karakorum, he made David Ulu the senior king and divided the Kingdom of Georgia between them. After the treaty signed by the Mongols and the Cilician Armenia in 1243, the king Hetoum I sent his brother Sempad to the Mongol court in Karakorum and made a formal agreement in 1247 in which Cilician Armenia would be considered a vassal state of the Mongol Empire. Due to Armenia's voluntary surrender, Sempad received a Mongol wife, and his kingdom was spared Mongol overseers and tax. Güyük demanded full-submission of the Abbasids and the Ismailis. Güyük Khan blamed Baiju for the irritated resistance of the Abbasid Caliphate.