 Complete the following phrase:  Galicia-Volhynia was eventually assimilated by the Kingdom of Poland, while the Novgorod Republic and Mongol-dominated Vladimir-Suzdal, two regions on the periphery of Kiev, established the basis for the modern Russian nation. The Novgorod Republic escaped Mongol occupation and together with Pskov retained some degree of autonomy during the time of the Mongol yoke; they were largely spared the atrocities that affected the rest of the country. Led by Prince Alexander Nevsky, Novgorodians repelled the invading Swedes in the 