Corona de Hierro
Arnulf accompanied King Henry I on his 928 campaign against Duke Wenceslaus of Bohemia. In 935 he launched an attack against King Hugh of Provence to obtain the Iron Crown of Lombardy for his eldest son Eberhard, which only resulted in defeat. After King Henry had died in 936, the Duke attended the coronation of his son Otto as King of the Romans at Aachen Cathedral.