Phraates frā–āˈtēz [key], kings of Parthia of the dynasty of Arsaces. Phraates II, fl. 130 b.c., decisively defeated (129 b.c.) Antiochus VII of Syria, permanently annexing E Mesopotamia to his kingdom. Phraates IV, d. 2 b.c., had an early success in driving (36 b.c.) Antony out of Parthia. After 31 b.c., Phraates had to cope with a stubborn rebellion by one of his generals, who briefly usurped the throne. Phraates subsequently acknowledged his dependency to Rome. He died in a palace intrigue.

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