The Koliivshchyna was a major haidamaky rebellion that broke out in Right-bank Ukraine in June 1768, caused by money sent by Russia to Ukraine to pay for the locals fighting the Bar Confederation, the dissatisfaction of the peasants with the treatment of Eastern Catholics and Orthodox Christians by the Bar Confederation and the threat of serfdom and by hostility to the Polonized local Ruthenian nobility and to ethnic Poles by the Cossacks and the peasants. Wikipedia