 Wiśniowiecki 's <unk> and first biographer , Michał <unk> , counted that Jeremi participated in nine wars in his lifetime . The first of those was the <unk> Campaign of 1633 – 34 against the <unk> of Russia . In that war he accompanied <unk> Aleksander <unk> 's southern army and took part in several battles , among them the unsuccessful siege of <unk> ; later that year they took <unk> and <unk> before retreating . The following year he worked with Adam <unk> and <unk> <unk> , 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 <unk> and <unk> . The war ended soon afterward , and in May <unk> he returned to Lubny . For his service , he received a commendation from the King of Poland , Władysław IV Vasa , and the <unk> of Kiev . 
