Ladislaus II
After Géza II died on 31 May 1162, Emperor Manuel attempted to assist Stephen against his nephew and namesake, Stephen III, in seizing the crown. Although the Hungarian lords were willing to leave their young monarch, they sharply opposed Stephen and elected his brother, Ladislaus II, king. Ladislaus II granted the "ducatus", or duchy, which included one-third of the kingdom, to Stephen. Ladislaus II died on 14 January 1163, and Stephen succeeded him. Lucas, Archbishop of Esztergom, who remained a staunch supporter of the expelled young Stephen III, denied to crown him and excommunicated him. Stephen IV remained unpopular among the Hungarian lords, enabling his nephew to muster an army. In the decisive battle, which was fought at Székesfehérvár on 19 June 1163, the younger Stephen routed his uncle, forcing him once again to flee Hungary.