Complex sentence: Syrian governor Gaius Ummidius Durmius Quadratus sent a force to restore order, but he was recalled so as not to provoke a war with Parthia, whose King Vologases I took the opportunity to send his army into Armenia, driving out the Iberians (53).
Split into simpler sentences: Syrian governor Gaius Ummidius Durmius Quadratus sent a force to restore order, but was recalled so as not to provoke a war with Parthia. Consequently, King Vologases I took the opportunity to send his army into Armenia, driving out the Iberians (53).