The Cossack Hetmanate, officially the Zaporozhian Host, was a Ukrainian Cossack state. Its territory consisted of most of central Ukraine and parts of Belarus. It existed between 1649 and 1764, although its administrative-judicial system persisted until 1781.
Petro Dorofiiovich Doroshenko was a Cossack political and military leader, Hetman of Right-bank Ukraine (1665–1672) and a Russian voivode.
Ivan Dmytrovych Sirko was a Zaporozhian Cossack military leader, Koshovyi Otaman of the Zaporozhian Host and putative co-author of the famous semi-legendary Cossack letter to the Ottoman sultan that inspired the major painting Reply of the Zaporozhian Cossacks by the 19th-century artist Ilya Repin.
The Battle of Konotop or Battle of Sosnivka was fought between a coalition led by the Hetman of Zaporizhian Cossacks Ivan Vyhovsky and cavalry units of the Russian Tsardom under the command of Semyon Pozharsky and Semyon Lvov, supported by Cossacks of Ivan Bezpaly, on 29 June 1659, near the town of Konotop, Ukraine, during the Russo-Polish War (1654–1667). Vyhovsky's coalition defeated the Russians and their allies and forced the main Russian army to interrupt the siege of Konotop. However, the result of the battle only intensified political tensions in Ukraine and led to Vyhovsky's removal from power several months later.
Hryhoriy Hulyanytsky was a Ukrainian Cossack colonel, a skilled warrior and a shrewd politician.
The Siege of Zbarazh was fought near the site of the present-day city of Zbarazh in Ukraine between the Cossack Hetmanate and Crimean Khanate against the Polish–Lithuanian Commonwealth as a part of the Khmelnytsky Uprising. The siege lasted for seven weeks.
The Battle of Podhajce was fought in the town of Podhajce in the Polish–Lithuanian Commonwealth, and the area surrounding it as part of the Polish-Tartar War and the Great Turkish War. The army of the Polish–Lithuanian Commonwealth under John III Sobieski, totaling around 9,000 men, defeated Tatar and Cossack forces under Petro Doroshenko and Adil Giray, which totaled around 35,000 men.
Content in this edit is translated from the existing Ukrainian Wikipedia article at Битва під Костянтиновом; see its history for attribution.
The Chortomlyk Sich was a sich founded by Cossacks led by kish otaman Fedir Lutay in the summer of 1652 on the right bank of the Chortomlyk distributary of the Dnieper near the current village of Kapulivka.
The Battle of Kalnyk took place on 21 October 1671, during the Polish-Cossack-Tatar war of 1666-1671. The Polish crown hetman Jan Sobieski defeated the Cossack-Tatar army, which was coming to the aid of Kalnik, besieged by the Poles. Despite the victory, Sobieski failed to take Kalnik and retreated to Bratslav.
Left Bank Uprising or Bryukhovetsky Uprising was an uprising of Cossacks dissatisfied with the Andrusov truce against the tsarist government. A series of military failures of the Crimean-Cossack army led to the entry of the left-bank Ukraine into the Russian Tsardom, on the rights of autonomy
The Battle of Sich took place between the Ottoman-Crimean army and the Zaporozhian Cossacks, during the Ottoman-Crimean campaign into the Sich, at night on 19 December 1674.
The Battle of Igren is a semi-legendary battle that took place between the Tatar army of Crimean Khanate and the Zaporozhian Cossacks of Ivan Sirko, near Stanovoy and other adjacent islands, Samara River on Igren Peninsula, during summer of 1660.
The Crimean Campaign took place between the Crimean-Ottoman forces and the Zaporozhian Cossacks together with their allies, during the Zaporozhian Cossack campaign into Crimea, in September 1675.
The Right-Bank Uprising was initiated by Right-Bank peasantry, supported by Cossack-Russian troops against Right-Bank Hetman Pavlo Teteria and Poland-Lithuania in January 1664–1665.
The Crimean Campaign took place between the Crimean forces and the Zaporozhian Cossacks, during the Zaporozhian Cossack campaign into Crimea organised by Ivan Sirko, in October 1667.
The Kaffa massacre or Sack of Kaffa took place during the Crimean campaign in October 1667, after Cossack capture of Kaffa and subsequent sacking of it, during which 3,500 Tatar civilians fell victim to the Cossacks.
The Siege of Perekop took place between the Crimean-Ottoman Janissary forces and the Cossack-Russian forces together with their Kalmyk allies, with destruction of Perekop and surrounding settlements, between 11 October to 16 December 1663.
The Crimean Blockade was enacted by the Zaporozhian-Don Cossacks with the goal of delaying the Crimean support for Poland-Lithuania, from 6 July to 14 September 1655.
The Chyhyryn Campaign was launched by the Ottoman-led coalition against the Cossack-Russian defenders of Chyhyryn with the goal of capturing the fortress, from 8 July to 17 August 1678.
Zaporozhian Cossacks 
Kalmyk Khanate 
Polish-Lithuanian Commonwealth 
Crimean Khanate