Early life and studies

King John II Casimir funded a scholarship for young Kątski, so that in the years 1653–1657 he would become familiar with the latest trends in the art of war by serving in the French army and commanding together with Marshal Prince Louis de Bourbon in the Netherlands. In the years 1663 to 1664 as a lieutenant colonel of infantry, he took part in a military expedition of John II Casimir to the Dnieper river in Ruthenia.

Military career and politics

Kątski became the General of Artillery of the Crown in 1667. He Participated in all of the campaigns of chief captain, Hetman, and later King John Sobieski, including the siege of Vienna in 1683, when Kątski was only an artillery commander. However all of the armies of the Allies commanded by him managed to get through with 28 guns through the hills of the Viennese Woods.

During the reign of Augustus II the Strong he defeated the Turks near Kamieniec Podolski and regained the fortress.

During his military career, Kątski received merit for the development of Polish artillery and fortifications. His effort was visible at the confluence of the Dniester and Zbrucz rivers where a neglected defensive castle developed into the famous fortress and stronghold called Okopy Św. Trójcy (lit. Trenches of Holy Trinity).

In 1669 Kątski killed, in a duel, the Governor of Krosno Jan Karol Fredro. In 1674 he was the elector of King John III Sobieski. After the death of John III, Kątski was even considered as a potential heir to the throne. Following the election of Augustus II the Strong he was the steward and the governor of Podolia, the governor of Przemyśl, castellan of Lwów, Kiev and provincial governor and castellan of Kraków.