and their strength grew after Khwarazm-Shah had shattered the Khitans, and they began to ravage the land. Their chieftain was called Kishlu Khan (1). The king of the Khitans wrote to Khwarazm-Shah: “What passed between us is forgiven. A hard enemy has fallen upon us; if he wins the day, nothing will keep him from you. Wisdom therefore dictates that you come to our aid.”
Khwarazm-Shah replied, “I am on my way to help you,” yet at the same time he wrote to Kishlu Khan: “I am coming, and I stand with you against the Khitans.” It was the worst of plans. He advanced until the two armies faced one another, and Khwarazm-Shah camped opposite them, leading each side to believe he was with it and lying in ambush for its sake. The rout then struck the Khitans, whereupon Khwarazm-Shah threw his support behind Kishlu Khan. Slaughter raged among the Khitans; they fled to the mountain tops, some of them entered Khwarazm-Shah’s service, and Kishlu Khan humbled himself before him, saying, “Let us divide the Khitan realm between us.”
Khwarazm-Shah retorted, “No, the land is mine,” and marched out to fight him. Once he realised the strength of the Tatars he began to dodge and harry them. Kishlu sent word: “Is this the conduct of a king? It is the way of thieves! If you are truly a king, draw up for a pitched battle (2).”
Khwarazm-Shah gave him no reply. Instead, he ordered the people of Farghana, Shash, and the Turkic towns to flee to Bukhara and Samarqand, then demolished those cities and levelled them, being unable to defend them against the Tatars.
Soon afterwards the tyrant Chinggis Khan marched against Kishlu Khan. They fought for a time until Chinggis Khan prevailed; he grew overbearing and rebellious, annihilated land and people, seized the Khitan provinces, made Khan Balik the seat of his rule, destroyed nations in the Turkic territories, Transoxiana, and Khurasan, and routed every army.
The story of his deeds is a chronicle unto itself, and al-Muwaffaq al-Baghdadi has given an excellent description of them, saying: