pleaded with him to change his mind. Jeremi would not budge although he remained on decent terms with the Orthodox Church, avoiding provocative actions, and supported his uncle and Orthodox bishop Peter Mogila and his Orthodox Church collegium. Later life Wiśniowiecki's courtier and first biographer, Michał Kałyszowski, counted that Jeremi participated in nine wars in his lifetime. The first of those was the Smolensk Campaign of 1633–34 against the Tsardom of Russia. In that war he accompanied castellan Aleksander Piaseczyński's southern army and took part in several battles, among them the unsuccessful siege of Putyvl; later that year they took Rylsk and Sevsk before retreating. The following year he worked with Adam Kisiel and Łukasz Żółkiewski, commanding his own private army of 4,000. As his troops formed 2/3 of their army (not counting supporting Cossack elements), Jeremi, despite being the most junior of commanders, had much influence over their campaign. Lacking in artillery, they failed to take any major towns, but ravaged the countryside near Sevsk and Kursk. The war ended soon afterward, and in May 1634 he returned to Lubny. For his service, he received a commendation from the King of Poland, Władysław IV Vasa, and the castellany of Kyiv. After the war Wiśniowiecki engaged in a number of conflicts with neighbouring magnates and nobles. Jeremi was able to afford a sizable private army of several thousands, and through the threat of it he was often able to force his neighbours to a favourable settlement of disputes. Soon after his return from the Russian front, he participated on the side of the Dowmont family in the quarrel over the estate of Dowmontów against another magnate, Samuel Łaszcz, located on his lands; soon after the victorious battle against Łaszcz he bought the lands from the Dowmonts and incorporated them into his estates. Around 1636 the Sejm (Polish parliament) opposed the marriage of King Władysław IV Waza to Wiśniowiecki's sister, Anna. Following this, Jeremi distanced himself from the royal court, although he periodically returned to Warsaw, usually as one of the deputies to the Sejm from the Ruthenian Voivodeship. Soon afterward, Jeremi himself married Gryzelda Zamoyska, daughter of Chancellor Tomasz Zamoyski, on 27 February 1639, Gryzelda's 16th birthday. At that time Wiśniowiecki also engaged in a political conflict over nobility titles, in particular, the title of prince (kniaź). The nobility in the Commonwealth was officially equal, and used different and non-hereditary