who then made Achaeus governor of Seleucid Asia Minor north of the Taurus. Achaeus embarked upon a remarkably successful campaign, rapidly reclaiming Asia Minor for the Seleucids. Within two years Achaeus had recovered all the lost Seleucid territories and "shut up Attalus within the walls of Pergamon". In a stroke of good fortune for Attalus, Achaeus revolted against Antiochus III around 220 BC and declared himself the Seleucid king.

After a period of peace, in 218 BC, while Achaeus