Matthew III Csák
Matthew III Csák was the "de facto" ruler of the western territories of present-day Slovakia, from his seat at Trenčín. He allied himself with the murdered Amade Aba's sons against Košice, but King Charles I of Hungary, who had managed to acquire the throne against his opponents, gave military assistance to the town and the royal armies defeated him at the Battle of Rozgony / Rozhanovce in 1312. However, the north-western counties remained in his power until his death in 1321 when the royal armies occupied his former castles without resistance.