From the early days, the reign of Jan Kazimierz was plagued by wars that beset the Polish-Lithuanian Commonwealth, starting with a Cossack revolt supported by Tatar forces in 1648, through wars with Muscovy (1654-1667), Sweden (1655-1660), Brandenburg (1656-1657) and Transylvania (1657), to fighting the Cossacks and Tatars in 1667. The Swedish invasion of 1655 proved… Continue reading Lwów vows of Jan Kazimierz
