Therewith Palmyra stepped into the first place in the East. Gallienus, more than sufficiently occupied by the barbarians of the West and the military insurrections everywhere breaking out there, gave to the prince of Palmyra, who alone had preserved fidelity to him in the crisis just mentioned, an exceptional position without a parallel, but under the prevailing circumstances readily intelligible; he, as hereditary prince, or, as he was now called, king of Palmyra, became, not indeed joint ruler, but independent lieutenant of the emperor for the East.[101] The local administration of Palmyra was conducted under him by another Palmyrene, at the same time as imperial procurator and as his deputy.[102] Therewith the whole imperial power, so far as it still subsisted at all in the East, lay in the hand of the “barbarian,” and the latter with his Palmyrenes, who were strengthened by the remains of the Roman army corps and the levy of the land, re-established the sway of Rome alike rapidly and brilliantly. Asia and Syria were already evacuated by the enemy. Odaenathus crossed the Euphrates, relieved at length the brave Edessenes, and retook from the Persians the conquered towns Nisibis and Carrhae (264). Probably Armenia also was at that time brought back under Roman allegiance.[103] Then he took--for the first time since Gordianus--the offensive against the Persians, and marched on Ctesiphon. In two different campaigns the capital of the Persian kingdom was invested by him, and the neighbouring region laid waste, and there was a successful battle with the Persians under its walls.[104] Even the Goths, whose predatory raids extended into the interior, retired when he set out for Cappadocia. A development of power of this sort was a blessing for the hard-pressed empire, and at the same time a serious danger. Odaenathus no doubt observed all due formalities towards his Roman lord-paramount, and sent the captured officers of the enemy and the articles of booty to Rome for the emperor, who did not disdain to triumph over them; but in fact the East under Odaenathus was not much less independent than the West under Postumus, and we can easily understand how the officers favourably disposed towards Rome made opposition to the Palmyrene vice-emperor,[105] and on the one hand there was talk of attempts of Odaenathus to attach himself to the Persians, which were alleged to have broken down only through Sapor’s arrogance,[106] while on the other hand the assassination of Odaenathus at Hemesa in 266-7 was referred to instigation of the Roman government.[107] The real murderer was a brother’s son of Odaenathus, and there are no proofs of the participation of the government. At any rate the crime made no change in the position of affairs. [Sidenote: Government of Zenobia.]