Many people do not know that the Mongols who overthrew the Abbasid Caliphate in Baghdad established a state for themselves in the Islamic East that lasted for nearly a century, known as the Ilkhanat, and that this state was just one state out of four states into which the Mongol Empire was divided. The Ilkhanate Mongols, who were known as the Mongols of Persia, converted to Islam after a period of living in an Islamic environment, and their conversion to Islam - at least in the beginning - was political. It aimed to bridge the great gap between the rulers and the ruled, and aimed to change the negative relationship between the two parties, as it was Muslims refuse to submit to the Mongols on the grounds that they are not Muslims and because of what they did to the Abbasid Caliphate. Although the Mongols converted to Islam, they maintained their famous brutality. They fought their Muslim neighbors, caused great tragedies, and were allied with the Crusaders. The Mongols also had an influential role in Iran's conversion to the Shiite sect about two centuries after the fall of their Ilkhanate state, especially after the rift that occurred between the Arab countries and Iran as a result of Mongol rule.