were freed in 1616 when the
Petro Sahaidachny's Cossacks
captured the town of Kaffa in Crimea In the 16th century, with the dominance of the Polish–Lithuanian Commonwealth extending south, the Zaporozhian Cossacks were mostly, if tentatively, regarded by the
Polish–Lithuanian Commonwealth as their subjects.
Registered Cossacks were a part of the
Commonwealth army until 1699. Around the end of the 16th century, relations between the Polish–Lithuanian Commonwealth and the
Ottoman Empire, which were not cordial to begin with, were further strained by increasing Cossack aggression. From the second part of the 16th century, the Cossacks started raiding Ottoman territories. The Polish government could not control the fiercely independent Cossacks but, since they were nominally subjects of the Commonwealth, it was held responsible for raids by their victims. Reciprocally, the
Tatars living under the Ottoman rule
launched raids in the Commonwealth, mostly in the sparsely inhabited south-east territories of Ukraine. Cossacks, however, were raiding wealthy merchant port cities in the heart of the Ottoman Empire, which were just two days away by boat from the mouth of the
Dnieper River. Consecutive treaties between the Ottoman Empire and the Polish–Lithuanian Commonwealth called for both parties to keep the Cossacks and Tatars in check, but enforcement was almost non-existent on both sides. In internal agreements, forced by the
Poles, the Cossacks agreed to burn their boats and stop
raiding. However, boats could be rebuilt quickly, and the Cossack lifestyle glorified raids and looting. (Council) During this time, the
Habsburg monarchy sometimes covertly employed Cossack raiders to ease Ottoman pressure on their own borders. Many Cossacks and Tatars shared an animosity towards each other due to the damage done by raids from both sides. Cossack raids followed by Tatar retaliation, or Tatar raids followed by Cossack retaliation, were an almost regular occurrence. The ensuing chaos and string of conflicts often turned the entire south-eastern Polish–Lithuanian Commonwealth border into a low-intensity war zone and led to an escalation of Commonwealth–Ottoman warfare, from the
Moldavian Magnate Wars to the
Battle of Cecora (1620) and wars in 1633–34. Cossack numbers expanded, with Ukrainian
peasants running from
serfdom in the Polish–Lithuanian Commonwealth. Attempts by the
szlachta to turn the Zaporozhian Cossacks into serfs eroded the Cossacks' once fairly strong loyalty towards the Commonwealth. Cossack ambitions to be recognized as equal to the szlachta were constantly rebuffed, and plans for transforming the Polish–Lithuanian Two-Nations Commonwealth into a
Polish–Lithuanian–Ruthenian Commonwealth (with the Ukrainian Cossack people) made little progress, owing to the Cossacks' unpopularity. The Cossacks' strong historic allegiance to the
Eastern Orthodox Church put them at odds with the
Catholic-dominated Commonwealth. Tensions increased when Commonwealth policies turned from relative tolerance to the suppression of the Orthodox church, making the Cossacks strongly anti-Catholic, which at that time was synonymous with anti-Polish. and
Jarema Wisniowiecki during the Khmelnytsky Uprising, by
Nikolay Samokish The waning loyalty of the Cossacks and the szlachta's arrogance towards them resulted in several Cossack uprisings against the Polish–Lithuanian Commonwealth in the early 17th century. Finally, the King's adamant refusal to bow to the Cossacks' demand to expand the
Cossack Registry was the last straw that prompted the largest and most successful of these: the
Khmelnytsky Uprising, which started in 1648. The uprising became one of a series of catastrophic events known as the
Deluge, which greatly weakened the Polish–Lithuanian Commonwealth and set the stage for its disintegration one hundred years later. Even though Poland probably had the best cavalry in Europe, their infantry was weak. Since Poland recruited most of its infantry from Ukraine, once this became free from Polish rule, the army of the Commonwealth suffered greatly. The
Koliivshchyna was a major
haydamak rebellion that broke out in
right-bank Ukraine in June 1768. It was caused by the dissatisfaction of peasants and Cossacks with the treatment of Orthodox Christians by the
Bar Confederation. Zaporozhian Cossack
Maksym Zalizniak was one of the leaders of the rebellion. == Organization ==