 During the subsequent Abbassid era, thousands more Turkmen warriors were brought into Iraq; however, the number of Turkmen who had settled in Iraq were not significant, as a result, the first wave of Turkmen became assimilated into the local Arab population.The second wave of Turkmen to descend on Iraq were the Turks of the Great Seljuq Empire.Large scale migration of the Turkmen in Iraq occurred in 1055 with the invasion of Sultan Tuğrul Bey, the second ruler of the Seljuk dynasty, who intended to repair the holy road to Mecca.