She was considered a Pagan by contemporary Christians of Europe and Elizabeth had to convert to Catholicism in order to marry Maria's father, Stephen.

[7][8][9] However, Mary refused to accept Andrew´s right to the crown, because in her view his father Stephen the Posthumous had been a bastard, and thus not a legitimate member of the House of Árpád (the royal family of Hungary).

Stephen had been born to the third wife of King Andrew II after her husband´s death, and was not recognised by his elder half-brothers, including Mary´s grandfather Béla IV.

[11][7][12] The Babonići, Frankopans, Šubići, and other leading Croatian and Slavonian noble families seemingly accepted her as the lawful monarch, although as events showed their loyalty in fact vacillated between her and Andrew III.

[15] In the ensuing war, Andrew recovered from Albert several important towns and fortresses - including Pozsony (Bratislava) and Sopron - which had previously been held by the powerful Kőszegi family.

[18][19] During 1290, Mary's sister Elisabeth fled from Bohemia with her son because her husband had lost favour and was executed, Mary allowed Elisabeth and her son to stay in Naples with her, before she became a nun, but escaped and remarried to Stephen Uroš II Milutin of Serbia (brother of Catherine's husband).

Catherine´s husband Stefan Dragutin, ruler of Syrmia, was allegedly willing to support Mary and her son Charles Martel.

[20] Charles Martel granted Slavonia to Dragutin's son, Vladislav, in 1292,[20] but most Hungarian noblemen and prelates remained loyal to Andrew III.

[24] Although many lords in Croatia and Slavonian and most Dalmatian towns recognized him as king before he marched to Zagreb,[25] Charles Robert was unsuccessful, because powerful Hungarian nobles, including the Kőszegis and Matthew Csák, reconciled with Andrew.

[29][30] However, most Hungarians considered Charles's coronation unlawful because customary law required that it should have been performed with the Holy Crown of Hungary in Székesfehérvár.

[29][31] During the following few years, different claimants fought for the Hungarian throne until Charles was finally proclaimed king on 27 November 1308 at the Diet in Pest.

When the line of Charles Martel and the Angevins in Hungary died out, it was Sigismund, a remote descendant of Bela IV, whose family succeeded.