Seleucus II Callinicus
Youngest son of Antiochus II and Laodice I, he was thirteen when his father died in 246 BC. That death led to the Third Syrian War. A year later, probably under the influence of his mother, Antiochus demands the possession of Asia Minor from his brother Seleucus II Callinicus and quickly declares his independence in order to expand his territory and his authority. Seleucus, struggling against the ptolemaic forces, has no choice but to accept.