Boran only reigned until about the autumn of 631. She was succeeded at Ctesiphon, probably after the brief intermediate reign of a prince, Peroz by name, by her sister Azarmidokht. At Nisibis, however, the troops of the murdered Shahrbaraz set up Hormuzd V, a grandson of Chosroes II, who held his ground in that district for some time (in the years 631 and 632). Azarmidokht was overthrown by Rustem, the mighty hereditary crown-general of Khorasan, whose father she had caused to be put to death. From the confused accounts of this time of confusion we cannot gather with any certainty who was king or who pretender in the capital or provinces, nor determine the date or even the sequence of these “reigns.”
It is certain that after Azarmidokht one Ferrukhzadh (or Khorrezadh) Chosroes was for some time accounted king at Ctesiphon. He was probably a child, and according to some authorities was the only son of Chosroes II who had escaped the general butchery. But others of the men in power set up another child at Persis, Yezdegerd III, son of Shahriyar and grandson of Chosroes II, and crowned him in the Fire temple of Ardashir (in the second half of 632 or the first half of 633). He was presently acknowledged in the capital, Chosroes having been put to death. No lasting resistance appears to have been encountered in other provinces.
ANARCHY AND CHAOS
No one could now dream of a real restoration of the fearfully distracted empire; but at least a grandson of Chosroes, who did not trace his descent from the parricide Sheroe, was sole king once more. He was consecrated at Istakhr, the home of the dynasty; and the mighty Rustem stood at his side. A change for the better seems really to have ensued, but it was no more than a brief respite. A foe destined to prove more formidable than Julian or Heraclius was already knocking at the gates of the empire. In the internal disorders which had distracted Ctesiphon, the loss of Yemen, and a few of the empire’s possessions in northeastern Arabia to the Moslems, had probably passed almost unnoticed.
The Moslems, however, were soon close at hand. The Bekr Bedouins had made raids upon the royal dominions several times since the battle of Dhu Kar. After a while Muthanna, one of their bravest chiefs, became a convert to Islam, and with that force behind them their attacks grew bolder. Then (probably in 633) the mighty Khalid, after subduing the insurrections in Arabia, appeared with a small force on the lower Euphrates to conduct the operations of these same Bedouins. Persian Arabs and imperial troops were defeated in small engagements, and soon a number of border forts were in the hands of the Moslems. The inhabitants of the regions west of the Euphrates, who were all Christians, and, like all the Christians about the Euphrates and Tigris, felt little loyalty to the empire, submitted to the victors and even undertook to supply them with information.
ARAB INCURSIONS
[633-637 A.D.]
The Arabs were already beginning to rove on the far side of the Euphrates; they plundered Baghdad, then a village, while a fair was being held there, as well as other places on the right bank of the Tigris. But Khalid presently received orders (the commencement of the summer of 634) to start for Syria, the conquest of which was at the time a matter of greater consequence to the caliph. His successor, Abu Obaid of Taif, brought some reinforcements with him; but when at length a regular Persian army came on the scene, the Moslems, in spite of their heroic valour, were completely defeated in the “battle of the Bridge,” on the Euphrates, November 26th, 634. After their leader had fallen Muthanna had great difficulty in extricating the remains of his army. Most of the Moslem conquests were lost without further ado. After some hesitation Omar (caliph since August 23rd, 634) resolved to send more troops to Irak. He appealed simultaneously to the greed and piety of the Arabs, urging them in the same breath to win the treasures of Chosroes and the joys of paradise. A larger Persian army was now defeated for the first time (at Buwaib, 635 or 636); the commander, a member of the house of Mihran, was among the slain.