Complex sentence: A winter epidemic forced the Parthians to withdraw from Armenia, allowing Radamistus to come back and punish people as traitors; but they soon revolted and replaced him with the Parthian prince Tiridates (55).
Split into simpler sentences: A winter epidemic forced the Parthians to withdraw from Armenia, allowing Rhadamistus to return. They soon revolted and replaced him with the Parthian prince Tiridates (55).