Seleucus II Callinicus
The Battle of Ancyra was fought in ca. 239 BC between the Seleucid King Seleucus II Callinicus and his brother Prince Antiochus Hierax. Civil war had raged in the Seleucid Empire since 244 BC, when Queen Laodice I had supported her son Antiochus in a rebellion against Seleucus. Antiochus fought to establish his own kingdom in Anatolia. He was able to take advantage of his brother's distraction and defeat at the hands of Ptolemy III in the Third Syrian War. By 239 BC Seleucus had made peace with Ptolemy and having rebuilt his army, invaded Anatolia.