This state lost one military confrontation due to the failure of Casimir IV to arrive with his forces. Despite not witnessing it himself, Gabriel de Mussis (“moo-cease”) wrote an account of a successful siege by this state. (-5[1])Sofony (“suh-PHONE-ny”) of Ryazan praised one ruler’s victory over this state in the Zadonshchina (15[1])(“ZAH-doan-sheen-uh”). During one battle, a champion from this state was killed in single combat with the warrior monk Alexander Peresvet (15[1])(“pear-ee-see-yet”). This state lost control of one city to Grand Duke Algirdas after its defeat at the Battle of Blue Waters. A prince named (*) Dmitry gained the epithet “Donskoy” after defeating this state’s general Mamai (10[1])at the Battle of Kulikovo. The retreat of this state’s army following the Great Stand on the Ugra River was seen as (-5[1])the end of the “Tatar Yoke.” (10[1])For 10 points, name this successor state to the Mongol (10[1])Empire (10[1])which controlled much of modern Russia. ■END■ (0[1])