The Grand Duchy of Lithuania became Becoming a Swedish fief , the Polish–Lithuanian regular armies surrendered Surrendering and the Polish king John II Casimir Vasa fled Escaping to the Habsburgs .

Exploiting the hurt religious feelings of the Roman Catholic population under Protestant occupation and organizing Arranging Polish–Lithuanian military leaders in the Tyszowce Confederation , John II Casimir Vasa managed to regain ground in 1656 .

John II Vasa found Know an ally in Leopold I of Habsburg , whose armies crossed Motion_directional into Poland–Lithuania from the southwest .

After defeating Conquering a Danish counter-attack Attack outside Västerås , Vasa sent Sending two of his military commanders , Jöns Olofsson and Lars Eriksson , to take control Control of the western province of Uppland .

Shortly after Gustav Vasa left Departing his camp outside Västerås and headed Self_motion to Uppsala , three weeks after the city 's conquest Change_of_leadership , the local archbishop made Manufacturing an attack Attack , forcing Gustav to flee .