sentences:  In 580, the Ghassanids scored yet another victory over the Lakhmids, while Byzantine raids again penetrated east of the Tigris.However, around this time the future Khosrow II was put in charge of the situation in Armenia, where he succeeded in convincing most of the rebel leaders to return to Sassanid allegiance, although Iberia remained loyal to the Byzantines.The following year, an ambitious campaign along the Euphrates by Byzantine forces under Maurice and Ghassanid forces under al-Mundhir III failed to make progress, while the Persians under Adarmahan mounted a devastating campaign in Mesopotamia.