Stanisław "Rewera" Potocki (, 1589–1667) was a Polish noble, magnate and military leader. Together with Stefan Czarniecki he was successful in defeating the invading Swedes and Russians during The Deluge. He was the most trusted advisor of King John II Casimir. Biography Early life Initially a lukewarm member of the Polish Reformed Church, under the influence of Jesuits and his first wife he converted from Calvinism to Catholicism. Potocki was married to Zofia Kalinowska and Anna Mohyła. After careful studies at home and abroad (mostly in France and in the Netherlands) he began his great military career by fighting the rebels with his father and uncles on the side of King Sigismund III at the Battle of Guzów. He then took part in an expedition to Wallachia and in the siege of Smolensk in 1611, during the Polish-Russian war. He also fought in Cecora (1620) and Chocim (1621). He took part in the war with Sweden (1626–1629) temporarily replacing Stanisław Koniecpolski who suffered a major defeat at Górzna in 1629. He fought the rebellious Cossacks in the years 1637–1638. Military career He was the podkomorzy (Chamberlain) of Podolia from 1621, castellan of Kamieniec Podolski from 1628, and voivod of the Bratslav Voivodeship from 1631 and the Podolia voivodeship from 1636. Potocki became Field Crown Hetman in 1652 and Great Crown Hetman in 1654. He was voivod of Kiev Voivodship from 1655 and voivod of Kraków Voivodship from 1658. Potocki was also Starost of Halych, Radom, Krasnystaw, Ropczyce, Medyka, Bar, Grodziec, Kolomyia, Mostyska, Drahimów, Letychiv and Dolina. He was the Elector of King Władysław IV representing the Bratslav province in 1632. He was also the Elector of King John II Casimir in 1648 from the province of Podolia. During the Khmelnytsky Uprising, it is believed that Potocki saved the king's life near the town of Zborów. In 1652 he was appointed the Field Hetman of the Commonwealth and two years later he commanded the Polish army against the Russians and Cossacks. In 1655 he fought and won the Battle of Ochmatów. In the same year he was nominated the voivode of Kiev. After the invasion of the Swedish army during the Deluge he was permanently commanding the army in the East, however not engaging against the Swedes. After the defeat of the Russian-Cossack army under Gródek Jagielloński Potocki was forced to surrender to King Charles X Gustav. He later joined the