During the Hussite Wars, the town was pawned to Catholic nobleman Beneš of Valdštejn, therefore Šumperk was opposed to the Hussite Reformation. The Hussite armies successfully completed their campaign in East Bohemia on 14 September 1424, and moved into North Moravia on 23 September. Šumperk was not the principal target of the Hussite warlords, whose primary goal was to conquer the Moravian Margraviate capital in Olomouc, but an attack on Šumperk was initiated by local lord Proček Bouzovský of Vildenberk, the owner of Loštice. The siege was short because the town gates were opened by Hussite sympathizers in Šumperk. Proček Bouzovský of Vildenberk ruled the town until 1445, when Šumperk was besieged by Catholics from Olomouc. Again, town gates were opened by disloyal inhabitants.