Лев Диакон
In 945, Igor of Kiev ruler of the Kievan Rus was killed while collecting tribute from the Drevlians in Iskorosten. According to 10th century Byzantine historian and chronicler, Leo the Deacon: "They [Drevlians] had bent down two birch trees to the prince's feet and tied them to his legs; then they let the trees straighten again, thus tearing the prince's body apart." The "Primary Chronicle" blames Igor’s death on his own excessive greed, indicating that he tried to collect tribute for a second time in a month.