Assertion: empire's territory | /r/HasProperty | leading cassander
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text: By 316 BC, Antigonus had taken the territory of Eumenes and managed to eject Seleucus Nicator from his Babylonian satrapy, leading Cassander, Ptolemy, and Lysimachus to issue a joint ultimatum to Antigonus in 315 BC for him to surrender various territories in Asia.