On 1 September 1466 Nicholas I and other Silesian rulers came up with the project to reconcile the Hussite King George of Bohemia with the Bishopric of Wrocław and Pope Paul II; however, due to rejection by the Catholic hierarchy, on 23 December the Bohemian King made the formal announcement of the war in Wrocław.
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The settlement between King George and Nicholas I was signed on 16 August 1460: the King finally accepted the rule of the Duke of Opole over Strzelce, Niemodlin and Olesno, but in exchange Nicholas I had to resign his claims over the Duchy of Opawa (he bought the Duchy in 1454 from his co-ruler Ernest, but as a result of the King's strong opposition, Nicholas I wasn't able to take effective control over this land).
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George purchased the 1/3 share of Opava after Bolko's death from the latter's brother Nicholas I and in 1464, he purchased the other 2/3 in Opole in 1464 from John II, thereby considerable increasing his political and economic influence in Silesia.