Of the booty taken in the first encounters, the most important part consisted of arms. Prisoners were remorselessly put to death. In fact, according to Kharijite doctrine, they were unbelievers, and worthy of death; while the women and the children, as non-Moslems, were made slaves. When at last the negro chief had defeated an army consisting principally of inhabitants of Basra, he marched in person against that town; he calculated, it would seem, that one of the two town parties, with which he had frequently had dealings, would declare itself for him; but in this he was deceived. The people, high and low, stood together. They faced him on Sunday, 23rd October 869 (full six weeks only after the date of his first rising), and completely shattered his army; he himself barely escaped death, fighting bravely. But the citizen-army, though it had manfully defended hearth and home, was hardly fit to take the offensive, and certainly had no leader who could be matched with Alí, who quickly rallied his followers. When, on the second day, the first division of the Basrans was advancing by water, bodies of Zenj posted in ambush on both sides of the canal fell upon their rear. Some vessels capsized. The negroes fought with fury; their women threw bricks. Those also who were advancing by land were involved in the disaster; many were killed or drowned. The defeat of the townspeople was complete. A large number of members of the ruling family even, descendants of Sulaimán,[[56]] the brother of the first two Abbásid Caliphs, perished. Alí caused a whole ship to be laden with heads of the slain and sent along a canal to Basra. His associates now urged him immediately to fall upon the town; but his reply was, that they ought to be glad that they might now count upon peace for some time, so far as the Basrans were concerned. He had in the meanwhile no doubt satisfied himself that he had no substantial following in Basra, and still felt himself too weak to make himself master of the great city.

After these events the Zenj chief caused to be established, on a suitable dry spot, impregnated with salt and thus without vegetation, a settlement of his blacks, which he exchanged for another in the following year. His people reared huts of palm branches, we may suppose, or perhaps of mud. The “palaces” of the chief and of his principal officers, the prisons for the numerous captives, the mosques, and some other public buildings which were gradually added, may in some cases have been relatively handsome and internally adorned with the spoils of the enemy, but their material was certainly, at best, sun-dried brick. In the broader sense, the city finally founded, called Mokhtára (“the elect city”), covered a large area, and included extensive fields and palm groves. It lay somewhat below Basra, abutted on the west bank of the Tigris, and was intersected by the canal Nahr Abilkhasíb, the main direction of whose course was from north to south (or perhaps from north-east to south-west); other canals also surrounded, or, we may suppose, traversed it. With the complete change of the water-courses in that region, it is hardly likely that its site will ever be exactly made out.

The inhabitants of this ephemeral capital for the most part, doubtless, drew the necessaries of life from the immediate neighbourhood. Yet they were also dependent to some extent on imports; so that in the end, when the blockade was fully established and all communications cut off, they were reduced to great extremity. Until then traders and Bedouins had ventured to bring provisions to the negro city even in full sight of the hostile army. The dates grown there served, in part at least, as payment for the Bedouins. But as the home consumption of this chief article of produce hardly left much over for trade, we must assume that the dealers who thus risked their lives for the sake of gain must have been paid for the flour, fish, and other provisions which they brought with articles of plunder, and with money that had been accumulated by plunder and taxation, or rather black-mail.

At the pressing entreaty of the terrified Basrans the government sent the Turkish general Jolán. For six months he lay in camp face to face with the Zenj. His troops, consisting mostly of horsemen, could not move freely over the ground, thickly planted as it was with date-palms and other trees, and broken up by water-courses. At last a night attack by the negroes upon the entrenched camp made such an impression upon his soldiers, that Jolán judged it expedient to withdraw to Basra. Previously to this an attack of the Basrans had been victoriously repelled by the Zenj. The latter now grew so bold that they seized upon a fleet of twenty-four vessels bound for Basra; much blood was shed in this action, and the booty, including many captive women and children, was very great. On Wednesday, 19th June 870, they attacked the flourishing town of Obolla, which lay four hours from Basra, on the Tigris (approximately on the site of the modern Bussorah), and captured it after a brief struggle, in which the commandant fell along with his son. The slaughter was great: many were drowned; the city, built of wood, fell a prey to the flames. The fall of Obolla had such an effect upon the inhabitants of Abbádán, a town on an island at the mouth of the Tigris, that they made their submission to the Zenj; in doing so they had to deliver up their slaves and all their arms; the former augmenting the fighting strength of the victors. Hereupon the negro chief sent an army far into Khúzistán (Susiana), the adjoining country on the east. Wherever submission was not made, fire and sword did their work. On Monday, 14th August, the capital Ahwáz (on the stream now known as the Kárún) was taken. The garrison of this important place had prudently withdrawn, and this doubtless secured for the inhabitants a milder treatment. But, of course, all the property of the government and of the governor, who with his people had remained at his post, was confiscated.

Thus, then, within less than a year an adventurer at the head of negro slaves had taken considerable cities, made himself master of the mouth of the Tigris, and gained control of wide territories. Even the disturbance to commerce was very serious. The communications of Bagdad, the world-city, were broken, and its victualling rendered a matter of difficulty. Basra trembled at the fate of Obolla. Matters certainly could never have gone quite so far, if in the meantime the greatest confusion had not prevailed at the then residence of the Caliph, Sámarrá (on the Tigris, some three days’ journey above Bagdad). At the very time of the fall of Obolla the disputes of those in authority had led to the death, after less than a year’s reign, of the pious Caliph Muhtadí, and the proclamation of his cousin Motamid as Caliph. But this was the beginning of an improved state of affairs. For though Motamid was not at all such a sovereign as the times demanded, yet his brother Mowaffak, who in reality held the reins of government, leaving to the Caliph only the honour and luxury of the exalted position, had intelligence and perseverance enough gradually to restore the power of the dynasty, in the central provinces at least. At first, indeed, he had too much on hand elsewhere to be able to think of the Zenj, but in the early summer of 871 he had got so far as to send against them an army under the command of his chamberlain Saíd. Saíd at first inflicted serious losses on them, but in the end suffered a disastrous defeat through a night attack. He was recalled, but his successor fared no better. Five hundred heads of soldiers of his were exhibited in the immediate neighbourhood of Basra; many were drowned. In Susiana, too, a general of the blacks had fought with success, but their chief called him back to cut off the Basrans anew from communication with the Tigris, which had recently been reopened for them by the imperial troops. This done, the Zenj for some time pressed hard on Basra itself, which had but an inadequate garrison, was torn by party dissensions, and was suffering from dearth. The negroes were joined by a number of Bedouins. Great as is the contempt with which the genuine Arab regards the black, the prospect of plunder, and the plunder of so rich a town as Basra, is an attraction which the hungry son of the desert cannot resist. These Bedouins were not equal to the Zenj, either in bravery or in loyalty; but they were valuable to the chief, as supplying him with a body of cavalry. On the 7th September 871, during the Friday service, the negro general Mohallabí, with these Arab horsemen and with black foot soldiers, penetrated into the city, but retired once more, after setting fire to it in several places. It was not till Monday that the Zenj took full possession. The massacre that followed was frightful. It is even alleged that many inhabitants were induced, by offers of quarter, to gather together at certain places, where they could more easily be cut down. The chief had vowed direst vengeance on the city which had deceived his hopes. His general Alí, son of Abbán, had allowed a deputation from one of the parties of the town to approach his chief with prayers for quarter; but he would not admit them to his presence, and superseded the general by a less soft-hearted man. The brutal negro slaves waded in the blood of the free men. The lowest estimate places the number of the slain in Basra at 300,000. The captured women and children were carried into slavery. The noblest women of the houses of Alí and of the reigning house of Abbás were sold to the highest bidder. Many negroes are said to have received as many as ten slaves, or more, for their share.

But a permanent occupation of the great city was not feasible. It was forthwith evacuated, and the army, which, immediately after the arrival of the shocking tidings, had been despatched from the capital, under Mowallad, against the Zenj, was able, in conjunction with the remains of the troops already in the district, to occupy Basra and Obolla without striking a blow. Many inhabitants who had been lucky enough to escape gathered together once more in Basra. But when Mowallad proceeded further against the Zenj, he was, like his predecessors, defeated in a night attack, and compelled to withdraw again to the neighbourhood of the town. In Susiana likewise the fortunes of war, after some fluctuations, proved favourable to the Zenj.

Mowaffak himself now advanced with a brilliant force to the neighbourhood of the negro city; but this also suffered defeat (29th April 872). The mortal wound of Moflih, the actual commander, seems to have thrown the soldiers into confusion at once. Mowaffak remained in the district of Obolla, keeping the Zenj steadily in his eye. In one of the battles of this period one of their best generals, Yahyá of Bahrein, was wounded and made prisoner. He was brought to Sámarrá, and there, in the brutal and cowardly fashion then customary in the treatment of prominent captive rebels, was led about on a camel for exhibition before being cruelly put to death in the presence of the Caliph.

After Mowaffak’s troops had somewhat recovered from the severe sicknesses from which they had suffered in those hot marshy regions, and had repaired their equipment, he again marched against the enemy; but although he occasionally gained some advantage and succeeded in rescuing captive women and children, he in the end sustained another reverse; and, to add to his misfortunes, his camp took fire and was burned. Towards the beginning of full summer, accordingly, he found himself compelled to quit the proper seat of war, and to withdraw to Wásit. His army melted away almost entirely, and he himself, in January 873, returned to Sámarrá, leaving Mowallad behind him in Wásit. The expedition on which such great hopes had been built had come to nothing; yet it had not been wholly vain, for Mowaffak had come to know the enemy more perfectly, and had seen more clearly how he was to be reached.

After the imperial army had left the field, the negro chief again sent considerable forces into Susiana, who, with some trouble, succeeded a second time in taking Ahwáz, the capital (beginning of May 873). Several prisoners of distinction, who had fallen into the hands of the victors there, had their lives spared by the chief, doubtless with a view to heavy ransoms. The expeditions of the Zenj into the neighbouring countries, be it noted, were designed less for the acquisition of permanent possessions than to procure food and booty, perhaps also to inspire terror in the enemy. The Zenj leader may sometimes have dreamt of conquests on the grand scale, but in the end he always recognised that he and his negroes were safe only among their marshes and ditches.

A new army, despatched from the capital, ultimately defeated the Zenj in Susiana, and drove them out of the country. Other armies pressed on them from other quarters, and sought to cut off their supplies. The principal leader in these enterprises was one of the most powerful men in the empire—Músá the Turk, son of Boghá, who had left Sámarrá in September 873. Still nothing decisive took place.