Russia was thus freed from the apprehension of trouble both on the Polish frontier and on the side of the steppes, where the power of the Petchenigs was effectively broken. A new war-cloud, however, rose in the south, emanating from a quarrel among Greek and Russian merchants at Constantinople, in which one of the latter was killed. [Sidenote: 1043] Yaroslav demanded satisfaction from the Greek Emperor, Constantine Monomachus, and not obtaining it, he sent an army against the Greeks, confiding its direction to his eldest son Vladimir and a boyarin named Vyatcha. Scorning the overtures for peace which came at late moment from the frightened Emperor, the Russians met their enemies in a naval fight, wherein the Greek fire and the inevitable storm played their accustomed parts. Six thousand of Vladimir’s men were forced to abandon their damaged vessels and attempt to make good their retreat overland, led by Vyatcha, who would not desert them in their extremity. Constantine, instead of resting content with the victory which fortune had given him, or following it up with a vigorous pursuit, satisfied himself with half-measures, returning in premature triumph to his capital while he sent the remainder of his ships to hunt the Russians out of the Bosphorus. Vladimir meanwhile had rallied his fleet and turned fiercely at bay, destroying twenty-five of the Byzantine vessels and killing their admiral. Consoled by this success he returned home, carrying with him many prisoners. The division which had attempted the land passage was less happy; overpowered by a large Greek force near Varna, the survivors were taken captive to Constantinople, where many of them, including the brave boyarin, were deprived of their eyesight. This was the last of the series of expeditions made by the early rulers of Russia against Constantinople, expeditions which suggest a parallel with those against Rome which exercised such a fatal fascination over the Saxon and Franconian Emperors of Germany at the same period. Not for many a long century were the Russian arms to push again across the blue waters of the Danube into the land of their desire. In 1046 peace was formally concluded between the two countries, and the blinded prisoners were allowed to return to their native land.