It proceeded from a man who understood how to make use of the increasing hatred of the Cossacks for his purposes, and who was regarded by his countrymen as their ideal. Bogdan Chmielnicki (Russian Chmel), born about 1595, died 1657, before whom all Poland trembled for several years, gave Russia the first opportunity of interfering in the Polish republic, and was a frightful scourge for the Jews. Chmielnicki, brave in war and artful in the execution of his plans, impenetrable in his schemes, at once cruel and hypocritical, had been vexed by Jews, when he held the subordinate position of camp secretary (Pisar) of the Cossacks subject to the house of Koniecpolski. A Jew, Zachariah Sabilenki, had played him a trick, by which he was robbed of his wife and property. Another had betrayed him when he had come to an understanding with the Tartars. Besides injuries which his race had sustained from Jewish tax farmers in the Ukraine, he, therefore, had personal wrongs to avenge. His remark to the Cossacks, "The Poles have delivered us as slaves to the cursed breed of Jews," was enough to excite them. Vengeance-breathing Zaporogians and booty-loving Tartars in a short time put the Polish troops to flight by successful manoeuvres (May 18, 1648). Potocki, the lieutenant-general, and 8,000 Poles, according to agreement, were delivered to the Tartars. After the victory the wild troops went eastward from the Dnieper, between Kiev and Pultava, plundering and murdering, especially the Jews who had not taken flight; the number of the murdered reached several thousand. Hundreds underwent baptism in the Greek Church, and pretended to be Christians, in order to save themselves. Fortunate were those who fell into captivity with the Tartars; they were transported to the Crimea, and ransomed by Turkish Jews. Four Jewish communities (Porobischa and others) of about 3,000 souls resolved to escape massacre by surrendering to the Tartars with all their property. They were well treated, and sold into Turkey, where they were ransomed in a brotherly manner by those of their own race. The Constantinople community sent a deputy to Holland to collect money from the rich communities for the ransom of captives.