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By seizing the throne of Galicia, he dominated the western regions of Kievan Rus'.[6] In the early 13th century, Byzantine chroniclers applied the imperial title of autocrate (αύτοκράτωρ) to him, but there is no evidence that he assumed it officially.[6]
He waged two successful campaigns against the Cumans, from which he returned with many rescued captives.[3] The effect of Roman's victory was, however, undermined by new divisions among the princes of Rus'.[6]
