Ka cika wannan jumla: Michał Kazimierz Pac ya shiga aikin soja sa'ad da yake matashi kuma ya samu ci gaba a aikin soja. A shekara ta 1663, a lokacin
Yaƙin Arewa na biyu (Ruwa), lokacin da sojojin Rasha da na Sweden suka mamaye yankin Polish-Lithuanian Commonwealth, an nada Pac a matsayin Field Hetman na Lithuania da voivode na Smolensk. An ci gaba da inganta shi zuwa Babban Hetman a 1667 da kuma voivode na Vilna a 1669. Pac ya yi adawa da zaɓen Michael Korybut Wiśniowiecki (ya yi mulki 1669<unk>1673) zuwa kursiyin Commonwealth. A cikin 1673, Pac ya yi yaƙi a Yaƙin Chocim da Turkawa. Bayan mutuwar Wiśniowiecki, ya yi adawa da zaben John III Sobieski (ya yi mulki 1674 <unk> 1696). Lokacin da aka gano cewa Pac ya yi makirci tare da Ostiryia da Brandenburg a kan Sobieski, ya fadi daga alherin jama'a.