In 969 Boris II. followed Peter on the Bulgarian throne. He was faced by a new Russian invasion and by an attack from Czar David of Western Bulgaria. This latter attack he beat off, but was overwhelmed before the tide of Russian invasion and himself captured in battle. The Russians passed over Bulgaria to attack Constantinople, and that brought the Greeks into line with the Bulgarians to resist the invader. The Emperor John Zemissius made bold war upon the Russians, and captured from them their Bulgarian prisoner, the Czar Boris II. The Greek Emperor made no magnanimous use of his victory. He deposed the Bulgarian Czar and the Bulgarian Patriarch, emasculated the Czar's brother, and turned Bulgaria into a Greek province. Only in the rebel province of West Bulgaria did Bulgarian independence at this time survive, and from that province there arose in time a deliverer, the Czar Samuel, who was the fourth son of that boyar Shishman who founded the Western Bulgarian kingdom. At the beginning of his reign, in 976, Samuel had control only over the territory which is now known as Macedonia, but soon he united to it all the old Empire of Bulgaria, and stretched the sway of his race over much of the land which is now comprised in Albania, Greece, and Servia. He began, then, a stern war with the Greek Emperor, Basil II., known to history as "the Bulgar-slayer," against whom is alleged a cruelty horrible even for the Balkans. Capturing a Bulgarian army of over 10,000 men, Basil II. had all the soldiers blinded, leaving to each of their centurions, however, one eye, so that the mutilated men might be led back to their own country. A realistically horrible picture in the Sofia National Gallery commemorates this classic horror. The war between the Czar Samuel and the Emperor Basil II. was marked by fluctuating fortunes. At first the Bulgarians were altogether successful, and in 981 Basil was so completely defeated that for fifteen years he was obliged to leave Samuel as the real master of the Balkan Peninsula. Then the tide turned. Near Thermopylae, Samuel was decisively defeated by the Greeks, and soon after found his Empire reduced to the dimensions of Albania and West Macedonia. War troubles that the Greeks had with Asia brought to the Czar Samuel a brief respite, but a campaign in 1014--this was the one marked by the blinding of the captive Bulgarian army--shattered finally his power. He died that year heart-broken, it is said, at the sight of the return of his blinded army. Thus, to quote a Bulgarian chronicle: