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In page Primary Chronicle:

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The early part of the PVL features many anecdotal stories, among them:

  • the death of Oleg in 912, the "cause" of which was allegedly foreseen by him;
  • the legendary vengeance taken by Olga, the wife of Igor, on the Drevlians, who had murdered her husband;[2] (Her actions secured Kievan Rus' from the Drevlians, preventing her from having to marry a Drevlian prince, and allowing her to act as regent until her young son came of age.)[citation needed]
  • the Siege of Kiev (968) by the Pechenegs;