Seleucus II Callinicus
In the year 240 BC Alexander was still loyal to his nephew Seleucus II Callinicus, as he was the governor of Lydia, based at Sardis. In the civil war between Seleucus II Callinicus and his brother Antiochus Hierax, Alexander supported his second nephew, and held Sardis against attacks by Seleucus II.