 In 1637 Wiśniowiecki might have fought under Hetman Mikołaj Potocki against the Cossack rebellion of Pavel Pavluk ( the Pawluk Uprising ) ; Jan Widacki notes that historians are not certain whether he did and in either case , no detailed accounts of his possible participation survive . A year later , returning from the Sejm and from the engagement ceremony with Gryzelda , he gathered a 4 @,@ 000 strong division that participated in putting down of the Ostrzanin Uprising and arrived at the region affected by the unrest in June that year . Together with Hetman Potocki he defeated the insurgents at the Battle of Żownin , which turned into a rather difficult siege of the Cossack camp that lasted from 13 June till the Cossack relief forces were defeated on 4 August , and the Cossacks capitulated on 7 August . 
 In 1637 Wiśniowiecki might <a href='been_done' title='1'><mark>have</mark></a> fought under Hetman Mikołaj Potocki against the Cossack rebellion of Pavel Pavluk ( the Pawluk Uprising ) ; Jan Widacki <a href='uninflect' title='2'><mark>notes</mark></a> that historians <a href='negative_concord' title='3'><mark>are</mark></a> <a href='negative_concord' title='4'><mark>not</mark></a>certain whether he did and in either case , no detailed accounts of his possible participation survive . A year later , returning from the Sejm and from the engagement ceremony with Gryzelda , he gathered a 4 @,@ 000 strong division <a href='null_relcl' title='5'><mark>that</mark></a>participated in putting down of the Ostrzanin Uprising and arrived at the region affected by the unrest in June that year . Together with Hetman Potocki he defeated the insurgents at the Battle of Żownin , which turned into a rather difficult siege of the Cossack camp <a href='null_relcl' title='6'><mark>that</mark></a>lasted from 13 June till the Cossack relief forces <a href='uninflect' title='7'><mark>were</mark></a> defeated on 4 August , and the Cossacks capitulated on 7 August . 
In 1637 Wiśniowiecki mite done fought under Hetman Mikołaj Potocki against the Cossack rebellion of Pavel Pavluk ( the Pawluk Uprising ) ; Jan Widacki note dat historians ain't certain whether he did and in either case , no detailed accounts of his possible participation survive . A year later , returning from the Sejm and from the engagement ceremony with Gryzelda , he gathered a 4 @,@ 000 strong division participated in putting down of da Ostrzanin Uprising and arrived at the region affected by the unrest in June tdatyear . Together with Hetman Potocki he defeated the insurgents at tdaBattle of Żownin , which turned into a rather difficult siege of the Cossack camp lasted from 13 June til thdaossack relief forces was defeated on 4 August , and the Cossacks capitulated on 7 August .