During the 11th century, the Seljuk Turks, who were influenced by Persian civilization in many ways, grew in strength and succeeded in taking the eastern province of the Abbasid Empire. By 1055, the Seljuks captured Baghdad and began to make their first incursions into Anatolia. When they won the Battle of Manzikert against the Byzantine Empire in 1071, it opened the gates of Anatolia to them. Although ethnically Turkish, the Seljuk Turks appreciated and became carriers of Persian culture rather than Turkish culture. Nonetheless, the Turkish language and Islam were introduced and gradually spread over the region and the slow transition from a predominantly Christian and Greek-speaking Anatolia to a predominantly Muslim and Turkish-speaking one was underway.In dire straits, the Byzantine Empire turned to the West for help, setting in motion the pleas that led to the First Crusade. Once the Crusaders took Iznik, the Seljuk Turks established the Sultanate of Rum from their new capital, Konya, in 1097. By the 12th century, Europeans had begun to call the Anatolian region Turchia or Turkey, the land of the Turks. The Turkish society in Anatolia was divided into urban, rural and nomadic populations; other Turkoman (Turkmen) tribes who had arrived into Anatolia at the same time as the Seljuks kept their nomadic ways. These tribes were more numerous than the Seljuks, and rejecting the sedentary lifestyle, adhered to an Islam impregnated with animism and shamanism from their central Asian steppeland origins, which then mixed with new Christian influences. From this popular and syncretist Islam, with its mystical and revolutionary aspects, sects such as the Alevis and Bektashis emerged. Furthermore, intermarriage between the Turks and local inhabitants, as well as the conversion of many to Islam, also increased the Turkish-speaking Muslim population in Anatolia.By 1243, at the Battle of Köse Dağ, the Mongols defeated the Seljuk Turks and became the new rulers of Anatolia, and in 1256, the second Mongol invasion of Anatolia caused widespread destruction. Particularly after 1277, political stability within the Seljuk territories rapidly disintegrated, leading to the strengthening of Turkoman principalities in the western and southern parts of Anatolia called the beyliks