King Phraates II of Parthia, son of Mithridates, the conqueror of Babylon, ruled the Parthian Empire from 138–127 BC. He was attacked in 130 BC by Antiochus VII Sidetes, ruler of the Seleucid Empire. Antiochus, however, was defeated and killed in a great battle in Media in 129 BC, which ended the Seleucid rule east of the Euphrates. Meanwhile Parthia was invaded by the Scythians (the Tochari of Bactria), who had helped Antiochus. Phraates marched against them, but was defeated and killed.
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