 Complete the following phrase:  Some of the other Alans remained under the rule of the Huns. Those of the eastern division, though dispersed about the steppes until late medieval times, were forced by the Mongols into the Caucasus, where they remain as the Ossetians. Between the 9th and 12th centuries, they formed a network of tribal alliances that gradually evolved into the Christian kingdom of Alania. Most Alans submitted to the Mongol Empire in 12391277. They participated in Mongol invasions of Europe and 