 Complete the following phrase:  The Drevlians initially fervently opposed the Kievan Rus. According to a number of chronicles, in the times of Kyi, Shchek and Khoryv supposedly, founders of Kiev the Drevlians had their own princely rule and were frequently at war with the Polyani. In 883, Prince Oleg of Novgorod made the Drevlians pay tribute to Kiev. In 907, the Drevlians took part in the 