Stanisław Żółkiewski
He started his military career soon after returning to the Commonwealth, raising a rota of 50 to 100 men. He gained military experience in the fight against the rebellious Cossacks during the Severyn Nalyvaiko's uprising under Field Crown Hetman Stanisław Żółkiewski. During that conflict he participated in the battle of Kaniów on 14 April 1596, and in the siege of the Cossack tabor near Lubny. In 1599, he was appointed the Elder (starost) of Samogitia.