Kilij Arslan I
The First Crusade was preached at the Council of Clermont in 1095 by Pope Urban II, with the goal of assisting the Byzantine Empire against the invasions of the Seljuk Turks. However, the main objective quickly became the control of the Holy Land. The Byzantines were frequently at war with the Seljuks and other Turkish dynasties for control of Anatolia and Syria. The Sunni Seljuks had formerly ruled the Great Seljuk Empire, but this empire had collapsed into several smaller states after the death of Malik-Shah I in 1092. Malik-Shah was succeeded in the Anatolian Sultanate of Rûm by Kilij Arslan I, and in Syria by his brother Tutush I, who died in 1095. Tutush's sons Fakhr al-Mulk Radwan and Duqaq inherited Aleppo and Damascus respectively, further dividing Syria amongst emirs antagonistic towards each other, as well as Kerbogha, the atabeg of Mosul. This disunity among the Anatolian and Syrian emirs allowed the crusaders to overcome any military opposition they faced on the way to Jerusalem.