sentences:  In another case in 1474, František Hag revolted due to lack of pay, but the conflict ended without violence, and he remained Matthias' subject until his death.Before his death on 6 April 1490, King Matthias asked his captains and barons to pledge an oath to his son John Corvinus and secure his succession to the throne.Though John was the biggest estate holder in Hungary and had the command over the Black Army, his stepmother, Queen Beatrice of Naples, invited two heirs, the Holy Roman Emperor Maximilian I and Polish prince John I Albert, for an assembly to be held at Buda to discuss who would inherit the throne.