CHAPTER II.
GROWTH AND CONSOLIDATION OF RUSSIA.
From 910 to 973.
Expedition to Constantinople .-- Treaty with the Emperor .-- Last Days of Oleg .-- His Death .-- Igor Assumes the Scepter .-- His Expedition to the Don .-- Descent Upon Constantinople .-- His Defeat .-- Second Expedition .-- Pusillanimity of the Greeks .-- Death of Igor .-- Regency of Olga .-- Her Character .-- Succession of Sviatoslaf .-- His Impiety and Ambition .-- Conquest of Bulgaria .-- Division of the Empire .-- Defeat, Ruin and Death of Sviatoslaf .-- Civil War .-- Death of Oleg .-- Flight of Vladimir .-- Supremacy of Yaropolk..