The credit which Mithridates had acquired by his conduct of the Armenian war he lost soon afterwards by the severity of his home administration. There is reason to believe that he drove his brother, Orodes, into banishment. At any rate, he ruled so harshly and cruelly that within a few years of his accession the Parthian nobles deposed him, and, recalling Orodes from his place of exile, set him up as king in his brother’s room. Mithridates was, it would seem, at first allowed to govern Media as a subject monarch; but after a while his brother grew jealous of him, and deprived him of this dignity. Unwilling to acquiesce in his disgrace, Mithridates fled to the Romans, and being favorably received by Gabinius, then proconsul of Syria, endeavored to obtain his aid against his countrymen. Gabinius, who was at once weak and ambitious, lent a ready ear to his entreaties, and was upon the point of conducting an expedition into Parthia, when he received a still more tempting invitation from another quarter. Ptolemy Auletes, expelled from Egypt by his rebellious subjects, asked his aid, and having recommendations from Pompey, and a fair sum of ready money to disburse, found little difficulty in persuading the Syrian proconsul to relinquish his Parthian plans and march the force at his disposal into Egypt. Mithridates, upon this, withdrew from Syria, and re-entering the Parthian territory, commenced a civil war against his brother, finding numerous partisans, especially in the region about Babylon. It may be suspected that Seleucia, the second city in the Empire, embraced his cause. Babylon, into which he had thrown himself, sustained a long siege on his behalf, and only yielded when compelled by famine. Mithridates might again have become a fugitive; but he was weary of the disappointments and hardships which are the ordinary lot of a pretender, and preferred to cast himself on the mercy and affection of his brother. Accordingly he surrendered himself unconditionally to Orodes; but this prince, professing to place the claims of patriotism above those of relationship, caused the traitor who had sought aid from Rome to be instantly executed. Thus perished Mithridates III. after a reign which cannot have exceeded five years, in the winter of B.C. 56, or the early spring of B.C. 55. Orodes, on his death, was accepted as king by the whole nation. CHAPTER XI. _Accession of Orodes I. Expedition of Crassus. His fate. Retaliatory inroad of the Parthians into Syria under Pacorus, the son of Orodes. Defeat of Pacorus by Cassius. His recall. End of the first War with Rome._