to conquer the west, i.e. Iraq. At that time, these countries were in the hands of Eldiguzids and Salghurids, and the authority of the Abbasid caliph's clergymen remained in these two regions partly. Sultan Muhammad was at enmity with the Caliph, because the caliph asked for help from the Ismailis and Qara Khitais to overthrow his rule and also because the Sultan wanted the authority of the Khwarazmians sentence in Baghdad. As a result of this dispute and enmity, Sultan Muhammad received a fatwa from the scholars of her country that "Bani Abbas" do not deserve the caliphate and one of "Husayni Sadat" (a person from the generation of Imam Husayn) should be chosen for this position. Therefore, he declared the caliph deposed and ordered that the name of the Abbasid caliph should not be mentioned in sermons and not be inserted on coins, and appointed one of the Termezi Alawi Sadats, as the caliphate. In 1217, Sultan Muhammad marched towards Baghdad, but because it was winter, his troops suffered a lot from the snow and cold in the Asadabad pass Between Kermanshah and Hamadan, and he returned to Khorasan. The reasons for the invasion The incident of killing the Mongol merchants in Otrar Genghis conquered Beijing after raiding northern China.Then he forced the Uyghur clans to obey him, Kuchlug Khan, the leader of the Naiman tribes, who had dominated the lands of the Qara Khitai tribes, was driven from there, and in this way, and thus Genghis found a common border with Khwarazmian, whose eastern border had reached these areas. What emerges from the evidence is that Genghis' campaign to Iran was not to gain a new land and gain trophies, because of the rich and huge country of China that he had under his control, so he didn't need to campaign to Iran because. Genghis was very interested in the spread of commerce and the movement of merchants, therefore he encouraged commerce and tried to establish friendly relations with Sultan Muhammad, whom he considered as a powerful king. So, he sent a group of his merchants headed by Mahmud Yalavach with gifts to visit Sultan Muhammad and informed him about the size of his country, prosperity of his possessions, and the strength of his army. Sultan Muhammad, who was trying to expand Khwarazmian's territory, got angry that Genghis had called him "his son" in his letter, but Mahmud