In the light of facts about the diplomatic work of Stibor and the Clan of Ostoja that was following the politics of King Sigismund, one can question whether Sigismund actually joined the anti-Polish alliance.
Mengingat fakta tentang karya diplomatik Stibor dan Wangsa Ostoja yang mengikuti politik Raja Sigismund, seseorang dapat mempertanyakan apakah Sigismund benar-benar bergabung dengan aliansi anti-Polandia.