Oleg was charmed with his conquest. The beautiful site of the town, the broad expanse of the river, the facilities which the stream presented for maritime and military adventures so delighted him that he exclaimed, "Let Kief be the mother of all the Russian cities." Oleg established his army in cantonments, strengthened it with fresh recruits, commenced predatory excursions on every side, and soon brought the whole region, for many leagues around, under his subjection. All the subjugated nations were compelled to pay him tribute, though, with the sagacity which marked his whole course, he made the tax so light as not to be burdensome. The territories of Oleg were now vast, widely scattered, and with but the frailest bond of union between them. Between the two capitals of Novgorod and Kief, which were separated by a distance of seven or eight hundred miles, there were many powerful tribes still claiming independence. Oleg directed his energies against them, and his march of conquest was resistless. In the course of two years he established his undisputed sway over the whole region, and thus opened unobstructed communication between his northern and southern provinces. He established a chain of military posts along the line, and placed his renowned warriors in feudal authority over numerous provinces. Each lord, in his castle, was supreme in authority over the vassals subject to his sway. Life and death were in his hands. The fealty he owed his sovereign was paid in a small tribute, and in military service with an appointed number of soldiers whom he led into the field and supported. Having thus secured safety in the north, Oleg turned his attention to the south. With a well-disciplined army, he marched down the left bank of the river, sweeping the country for an hundred miles in width, everywhere planting his banners and establishing his simple and effective government of baronial lords. It was easy to weaken any formidable or suspected tribe, by the slaughter of the warriors. There were two safeguards against insurrection. The burdens imposed upon the vassals were so light as to induce no murmurings; and all the feudal lords were united to sustain each other. The first movement towards rebellion was drowned in blood. Igor, the legitimate sovereign, had now attained his majority; but, accustomed as he had long been, to entire obedience, he did not dare to claim the crown from a regent flushed with the brilliancy of his achievements, who had all power in his hands, and who, by a nod, could remove him for ever out of his way.