6378–6387 (870–879). On his deathbed, Rurik bequeathed his realm to Oleg, who belonged to his kin, and entrusted to Oleg's hands his son Igor', for he was very young.

6388–6390 (880–882). Oleg set forth, taking with him many warriors from among the Varangians, the Chuds, the Slavs, the Merians and all the Krivichians. He thus arrived with his Krivichians before Smolensk, captured the city, and set up a garrison there. Thence he went on and captured Lyubech, where he also set up a garrison. He then came to the hills of Kiev, and saw how Askold and Dir reigned there. He hid his warriors in the boats, left some others behind, and went forward himself bearing the child Igor'. He thus came to the foot of the Hungarian hill, and after concealing his troops, he sent messengers to Askold and Dir, representing himself as a stranger on his way to Greece on an errand for Oleg and for Igor', the prince's son, and requesting that they should come forth to greet them as members of their race. Askold and Dir straightway came forth. Then all the soldiery jumped out of the boats, and Oleg said to Askold and Dir, "You are not princes nor even of princely stock, but I am of princely birth." Igor' was then brought forward, and Oleg announced that he was the son of Rurik. They killed Askold and Dir, and after carrying them to the hill, they buried them there, on the hill now known as Hungarian, where the castle of Ol'ma now stands.

Igor' twice besieged Constantinople, in 941 and 944, and although Greek fire destroyed part of his fleet, he concluded with the Eastern Roman Emperor Constantine VII a favourable treaty (945), the text of which the chronicle has preserved. In 913 and 944 the Rus' plundered the Arabs in the Caspian Sea during the Caspian expeditions of the Rus', but it remains unclear whether Igor' had anything to do with these campaigns.

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