 He soon emerged as one of the dominant powers in the steppe following destruction of Liao Dynasty by Jurchens.However, this situation soon challenged by Merkits and Tatars who kidnapped his son Toghrul in 1135.He soon reorganized the khanate between his sons.Center was Karabalgasun, while Toghrul ruled western part of the khanate as a subordinate to his uncle Gurkhan.