Two years later the virtuous but perhaps over-rigid Maurice was deposed and murdered by the centurion, Phocas, who, on the strength of his popularity with the army, boldly usurped the throne. Chosroes heard with indignation of the execution of his ally and friend, of the insults offered to his remains, and of the assassination of his numerous sons, and of his brother. One son, he heard, had been sent off by Maurice to implore aid from the Persians; he had been overtaken and put to death by the emissaries of the usurper; but rumor, always busy where royal personages are concerned, asserted that he lived, that he had escaped his pursuers, and had reached Ctesiphon. Chosroes was too much interested in the acceptance of the rumor to deny it; he gave out that Theodosius was at his court, and notified that it was his intention to assert his right to the succession. When, five months after his coronation, Phocas sent an envoy to announce his occupation of the throne, and selected the actual murderer of Maurice to fill the post, Chosroes determined on an open rupture. He seized Lilius, the envoy, threw him into prison, announced his intention of avenging his deceased benefactor, and openly declared war against Rome. The war burst out the next year (A.D. 603). On the Roman side there was disagreement, and even civil war; for Narses, who had held high command in the East ever since he restored Chosroes to the throne of his ancestors, on hearing of the death of Maurice, took up arms against Phocas, and, throwing himself into Edessa, defied the forces of the usurper. Germanus, who commanded at Daras, was a general of small capacity, and found himself quite unable to make head, either against Narses in Edessa, or against Chosroes, who led his troops in person into Mesopotamia. Defeated by Chosroes in a battle near Daras, in which he received a mortal wound, Germanus withdrew to Constantia, where he died eleven days afterwards. A certain Leontius, a eunuch, took his place, but was equally unsuccessful. Chosroes defeated him at Arxamus, and took a great portion of his army prisoners; whereupon he was recalled by Phocas, and a third leader, Domentziolus, a nephew of the emperor, was appointed to the command. Against him the Persian monarch thought it enough to employ generals. The war now languished for a short space; but in A.D. 605 Chosroes came up in person against Daras, the great Roman stronghold in these parts, and besieged it for the space of nine months, at the end of which time it surrendered. The loss was a severe blow to the Roman prestige, and was followed in the next year by a long series of calamities. Chosroes took Tur-abdin, Hesen-Cephas, Mardin, Capher-tuta, and Amida. Two years afterwards, A.D. 607, he captured Harran (Carrhse), Ras-el-ain (Resaina), and Edessa, the capital of Osrhoene, after which he pressed forward to the Euphrates, crossed with his army into Syria, and fell with fury on the Roman cities west of the river.