907 Oleg leads an expedition consisting of eighty thousand men and two thousand boats against Constantinople. A treaty of peace and commerce is concluded.
911 Oleg renews the treaty with the emperor of Constantinople securing valuable trading privileges for the Russians.
913 Oleg dies, and is succeeded by Igor.
941 Igor leads an expedition against Constantinople. His ships are destroyed by the Greek fire, and with great difficulty he brings his troops back to Kiev.
944 Igor leads a second expedition against Constantinople. The Byzantines rid themselves of the barbarians by renewing the treaty that had been made with Oleg and also paying a ransom. The treaty is given in full by Nestor. Of the fifty names attached to it three are Slavonic and the rest Norse, which shows that the two races, the conquerors and the conquered, are beginning to be fused.
945 Igor is killed by the Drevlians, a Slavonic tribe. His wife Olga assumes the regency during the minority of his son Sviatoslav.
955 Olga embraces Greek Christianity. Her subjects, however, remain on the whole pagans.
964 Sviatoslav assumes the rule. He is the first of the Varangians to bear a Slavonic name.
968 Sviatoslav, in the pay of the Byzantine emperor Nicephoros, leads an army of 60,000 men against the Bulgarians of the Danube.
970 Sviatoslav, after dividing the country among his three sons, again marches to Bulgaria, this time on his own account.