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Shiavault - a Vault of Shia Islamic Books The Alleged Role of Nasir Al Din Al Tusi in the Fall of Baghdad Mongol Plans For Expansion and Sack of Baghdad History reports that Chenghiz Khan initially sought friendship and close relations with the rulers of Iran and Iraq. At first he did not want to invade and attack these lands. To develop friendly relations, he sent his envoy and a trade delegation to the court of the Khwarazm Shah. The pride of Sultan Muhammad Khwarazm Shah (d.
617/1220) caused him to reject the overture and kill the envoy and the traders. The sultan's arrogance created difficulties for himself and for Iran. It led to a series of battles between the Mongols and the Khwarazmshahis in the eastern parts of Iran? [^21] To be sure the thoughtless action of Khwarazmshah, who perhaps failed to foresee the imminent success of the Mongols, was one of the causes of the Mongol attack.
According to Ibn al-'Athir, the sultan regretted his ugly action and was seeking a way out when Chenghiz Khan's message reached him. It said: "You killed my companions and traders and took away their possessions. Now, be ready for a war." [^22] On the other hand, the Mongols, who at first wanted only to unify the eastern territories, subsequently decided to expand their realm, and by availing the excuse provided by the Khwarazm sultan began their campaigns into Central Asia.
Some other factors, too, prompted their attach. In particular, the instigation of the Mongols by the Europeans to attack Islamic lands is notable. During the Crusades such an attack could be a great help to the Christians. In this connection, Armenian Christians were on the side of the Westerners.
From the time Chenghiz Khan began to entertain his ambition of expanding his realm into the regions of Western Asia, the Mongols vigorously pursued their conquests, and until his death in 624/1227 many areas of Iran had come under the Mongol onslaughts. These included Rey, Qumm, Kashan and Saveh, that is areas of Iraq al ajam.
[^24] The survival of Jalal al-Din Khwarazm Shah and his attack and retreat tactics in battling the aggressors (until 628/1230) restricted the penetration of the Mongols to the central areas of Iran, and the invaders turned towards the Caucasian areas where they extended their conquests. With the departure from the scene of Jalal al-Din, the Mongols, who had remained content with the occupation of Khorasan, began to invade other areas of Iran as well.