After the death of his father in 1431, and although he was legally an adult and able to govern by himself, Wenceslaus remained under the tutelage of his mother, together with his younger brothers, who were his co-rulers.

Despite maintaining good relations with Emperor Sigismund, in 1434, Wenceslaus became involved with the Hussites, particularly aiding the Burgrave of Będzin, Mikołaj Kornicz Siestrzeniec, in his campaigns against the Bishops of Kraków in the Kingdom of Poland.

It was only after Krystyna Koziegłowski's retaliatory expedition to Gliwice that Wenceslaus withdrew his support and made an agreement with Poland at the congress in Będzin on 15 October 1434.

According to the chronicler Ambrose of Byczyny, the wedding took place two months before, on 9 December 1438 in Wrocław; however, after further research, historians believed that this date wasn't the proper marriage ceremony but only the engagement.

For this reason, on 24 December 1443, he sold the Duchy of Siewierz to Zbigniew Oleśnicki, Bishop of Kraków (and from them, that land wasn't treated as part of Silesia).

The sale of Siewierz caused a long-lasting dispute between Wenceslaus and Duke Bolko V of Głogów, who didn't accept the transaction.