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THE CONTEST FOR THE EUPHRATES
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son Rhadamistus to invade Armenia, which was at that time in the hands of the pro-Roman Mithradates, brother of the Iberian ruler. Mithradates was soon besieged in Gorneae (Garni), not far from Artaxata, the capital. The Roman garrison in the beleaguered town was under the command of the prefect Caelius Pollio and the centurion Casperius. Rhadamistus attempted to bribe Pollio to surrender Gorneae; the prefect was sorely tempted to accept, but Casperius refused to be a party to such an affair. He secured a temporary truce and set out to persuade Pharasmanes to abandon the war or, if he should be unsuccessful there, to carry the news to Ummidius Quadratus, legate of Syria. Casperius reached Pharasmanes, but his negotiations with him were unsuccessful, for the Iberian king wrote secretly urging Rhadamistus to press the siege in every possible manner. The bribe offered to Pollio was increased, and, with the restraining influence of the centurion absent, a deal was soon struck. The Roman soldiers forced Mithradates to surrender by threatening to


    B. W. Henderson, "The Chronology of the Wars in Armenia, a.d. 51–63," Class. Rev., XV (1901), 159–65, 204–13, and 266–74; D. T. Schoonover, A Study of Cn. Domitius Corbulo as Found in the "Annals" of Tacitus (Chicago, 1906); Werner Schur, Die Orientpolitik des Kaisers Nero (Klio, Beiheft XV [1923]), pp. 7–38, and "Untersuchungen zur Geschichte der Kriege Corbulos," Klio, XIX (1925), 75–96, and "Zur Neronischen Orientpolitik," Kilo, XX (1926), 215–22; Arnaldo Momigliano, "Corbulone e la politica romana verso i Parti," Atti del IIº congresso nazionale di studi romani, I (Roma, 1931), 368–75; Mason Hammond, "Corbulo and Nero's Eastern Policy," Harvard Studies in Classical Philology, XLV (Cambridge, 1934), 81–104.