 Complete the following phrase:  Hunyadi accompanied the young King to Prague and concluded a treaty with Ulrich Eizinger who had expelled Ulrich of Celje from Austria and George of Poděbrady at the end of the year. Having returned to Hungary, Hunyadi convoked, in the name of the King but without his authorization, a Diet in order to make preparations for a war on the Ottomans who had in May 1453 