Tvrtko I of Bosnia
Following the death of Louis I in 1382 his wife Elizabeth of Bosnia acted as regent of the eleven-year-old Queen Mary. Her accession was denied by some noblemen who considered that King Charles III of Naples was the lawful heir to the throne. In Croatia John of Palisna, prior of Vrana, was the first to rise against Elizabeth. He was mainly opposed to the centralizing policy which Elizabeth's husband had enforced. He was accompanied by Tvrtko I of Bosnia, who was crowned as King of Bosnia in 1371. John was ultimately defeated by Elizabeth's army that seized his town of Varna and forced him to flee to Bosnia. After a brief period of peace a new movement against Queen Mary and Elizabeth emerged in 1385 that was led by John Horvat, Ban of Macsó, and his brother Paul Horvat, Bishop of Zagreb.