 Bolesław at the time was fourteen years old.In this way the war for control of Galicia–Volhynia was postponed until after Bolesław's poisoning in 1340; control of the area was not stabilized until 1370.According to Teodor Narbutt, Eufemija was drowned beneath the ice of the Vistula River on 5 February 1342 in order to keep her out of the succession disputes.