This video contains a segment in which the period of mongol rule over Russia is discussed. It gives an overview of how the Mongols conquered Kiev and how they subjugated the Russian princes. They allowed the princes to continue to rule as long as they paid tribute to the Mongol leaders. It also discusses the rise of Moscow during this time, which was due to Russian migration north east to escape the Mongols. The princes in Moscow accepted Mongol rule and so the city was protected, meaning that many people moved there.