Each party went its own way. Alai ud din died on the journey. When they arrived at the court of Mangu, the opposing officials defended each two of them their own cause. The Grand Khan decided that Rūm must be given to both brothers, Yzz ud din getting everything west of the Sivas, and Rokn ud din all that lay east of that river, as far as the Erzerum border. The tribute was fixed, which each Sultan must send in annually. After Alai ud din had set out for Mongolia, Rokn ud din’s partisans, thinking that Yzz ud din wished to be rid of this brother, had him slip away from the capital where agents were watching him. He went to Cesaraea, gathered troops there and led them to Konia where, defeated in battle, he was captured and imprisoned. In 1255, one year later, Baidju being impatient at Yzz ud din’s loitering with the tribute, entered Rūm, marched against Konia, and met the Sultan’s forces between Ak Serai and the capital where he scattered them. Yzz ud din fled and found refuge in the stronghold Anthalia. Baidju then took Rokn ud din out of prison and installed him as Sultan in all the Rūm provinces. Yzz ud din fled now a second time and found refuge with the Byzantine Emperor who was visiting Sardis. This emperor, Theodore Lascaris, fearing Rokn ud din’s partisans, as well as the Mongols, advised the fleeing Sultan to return to his kingdom. Yzz ud din took the advice, and offered submission to Hulagu, who upheld the division of Rūm between the two brothers. When Mangu became Grand Khan in 1251 the Cilician king, Hayton, begged Batu to recommend him to the new Mongol sovereign. Batu counseled him thus wise: “Go to Mangu and stop on the way to confer with me.” The Armenian, alarmed by the length of the journey, and knowing that evils might happen to the country in his absence, was fearful to leave it. Meanwhile Argun, the collector, with a great horde of Moslem assistants, appeared in Armenia. These men caused immense hardship to Christians. “Whoso could not pay,” declares an Armenian historian, “suffered torture. Owners of land were driven from their places, their children and women were sold into slavery. Any man trying to emigrate and caught in the act was stripped, beaten and torn to pieces by raging dogs kept for that purpose.”