Matthew III Csák
Andrew III died on 14 January 1301. With his death, the House of Árpád became extinct. A civil war between various claimants to the throne – Charles of Anjou, Wenceslaus of Bohemia, and Otto of Bavaria – followed Andrew's death and lasted for seven years. Hungary and Croatia had disintegrated into about a dozen independent provinces, each ruled by a powerful lord, or oligarch. Among them, Ugrin's distant relative, Matthew III Csák dominated the northwestern parts of Hungary (which now form the western territories of present-day Slovakia), Amadeus Aba controlled the northeastern lands, the Kőszegis ruled Transdanubia, James Borsa dominated Tiszántúl, and Ladislaus Kán governed Transylvania, while Paul Šubić ruled over Littoral Croatia and Bosnia as a de facto king. Ugrin Csák was the "de facto" ruler of Upper Syrmia. He was styled as "ispán" of Syrmia, Valkó, Bács and Požega counties in August 1303, thus he was considered the omnipotent lord in the region. Historian Pál Engel argued he held these dignities since the beginning of the 14th century until his death.