 Complete the following phrase:  The impact of the Mongol invasion on the territories of Kievan Rus was uneven. The advanced city culture was almost completely destroyed. As older centers such as Kiev and Vladimir never recovered from the devastation of the initial attack, the new cities of Moscow, Tver and Nizhny Novgorod began to compete for hegemony in the Mongol-dominated Russia. Although a Russian army defeated the Golden Horde at 