 The battle of Lechfeld, also known as the Battle of Augsburg in 955, in which Otto the Great and his army of the Holy Roman Empire defeated the Magyars, brought peace to Europe.The Hungarians demonstrated a use of siege weapons, including a battering ram at the Siege of Ausburg.After the death of the last king Demetrius Zvonimir of Croatia, he left no heir, so his wife Helen, the sister of Saint Ladislaus I of Hungary called the Hungarian troops to take control of the kingdom.