Duchy of Münsterberg
Discord remained between Hynek and Bishop Konrad, probably because of Hynek's utraquist sympathies and his Hussite past. Over the next few years, it led to military conflicts in which other Silesian princes were involved. Most of them rejected Hynek's claim on Duchy of Münsterberg, with the Estates of Münsterberg, headed by Captain Frederick Stosch playing a crucial role. In order to deter them and underline his claims on Münsterberg, Hynek sacked on 20 July 1442, the monastery at Henryków, to which the citizens of Münsterberg had a special relationship. When Hynek attacked again, aiming to conquer the Duchy, the citizens of Münsterberg were able to repel him.