Louis II of Hungary
After the Battle of Mohács, where King Louis II of Hungary was killed, John Zápolya, Voivode of Transylvania, ascended to the Hungarian throne. However, the Austrian Ferdinand also had a claim to the throne via the House of Habsburgs intermarriages with Louis II's Jagiellon dynasty. In 1527 Ferdinand mounted an offensive against King John. He was initially successful, with an early victory in the Battle of Tarcal (near Tokaj).