The Russian people, under Varangian domination, rapidly increased in power, and reduced many of their neighbours to submission. Oskold and Dir, the princes of Kiof, rendered themselves masters of the whole course of the Dnieper, and it would seem that either commercial jealousy or the rapacity of ambition produced some collision with the Byzantine settlements on the northern shores of the Black Sea; but from what particular circumstances the Russians were led to make their daring attack on Constantinople is not known. The Emperor Michael had taken the command of an army to act against the Saracens, and Oryphas, admiral of the fleet, acted as governor of the capital during his absence. Before the Emperor had commenced his military operations, a fleet of tw ohundred Russian vessels of small size, taking advantage of a favourable wind, suddenly passed through the Bosphorus, and anchored at the mouth of the Black River in the Propontis, about eighteen miles from Constantinople. This Russian expedition had already plundered the shores of the Black Sea, and from its station within the Bosphorus it ravaged the country about Constantinople, and plundered the Prince's Islands, pillaging the monasteries, and slaying the monks as well as the other inhabitants. The emperor, informed by Oryphas of the attack on his capital, hastened to its defence. Though a daring and cruel enemy,the Russians were by no means formidable to the strength and discipline of the Byzantine forces. It required no great exertions on the part of the imperial officers to equip a force sufficient to attack and put to flight these invaders; but the barbarous cruelty of the soldiers and sailors, and the wild daring of their Varangian leaders, made a profound impression on the people of Constantinople, suddenly rendered spectators of the miseries of war, in their most hideous form, in a moment of perfect security. We need not, therefore, be surprised to find that the sudden destruction of these dreaded enemies by the drunken emperor, of whom the citizens of the capital entertained probably even more contempt than hemerited as a soldier, was ascribed to the miraculous interposition of the Virgin of the Blachern, rather than to the superior military tactics and overwhelming numbers of the imperial forces. How far this expedition of the Russians must be connected with the enterprising spirit of that vigorous band of warriors and pirates from Scandinavia, who, under the name of Danes, Normans, and Varangians, became the sovereigns of Normandy, Naples, Sicily, England, and Russia, is still a subjec to flearned discussion.
About the same time a fleet, manned by the Saracens of Crete, plundered the Cyclades, and ravaged the coast of Asia Minor, carrying off great booty and a number of slaves. It would seem that the absence of the Emperor Michael from Constantinople at the time of the Russian attack was connected with this movement of the Saracens.