sentences:  In retaliation, Magyars crowned Mary's husband Sigismund of Luxembourg.King Sigismund's army was catastrophically defeated at the Battle of Nicopolis (1396) as the Ottoman invasion was getting closer to the borders of the Hungarian-Croatian kingdom.Without news about the king after the battle, the then ruling Croatian ban Stjepan Lacković and nobles invited Charles III's son Ladislaus of Naples to be the new king.