The Decline and Fall of the Roman Empire · Chapter 13 (2/6)

When Britain was thus dismembered from the empire, its importance was sensibly felt, and its loss sincerely lamented. The Romans celebrated, and perhaps magnified, the extent of that noble island, provided on every side with convenient harbors; the temperature of the climate, and the fertility of the soil, alike adapted for the production of corn or of vines; the valuable minerals with which it abounded; its rich pastures covered with innumerable flocks, and its woods free from wild beasts or venomous serpents. Above all, they regretted the large amount of the revenue of Britain, whilst they confessed that such a province well deserved to become the seat of an independent monarchy.1278 During the space of seven years it was possessed by Carausius; and fortune continued propitious to a rebellion supported with courage and ability. The British emperor defended the frontiers of his dominions against the Caledonians of the North, invited from the continent a great number of skilful artists, and displayed, on a variety of coins that are still extant, his taste and opulence. Born on the confines of the Franks, he courted the friendship of that formidable people, by the flattering imitation of their dress and manners. The bravest of their youth he enlisted among his land or sea forces; and, in return for their useful alliance, he communicated to the barbarians the dangerous knowledge of military and naval arts. Carausius still preserved the possession of Boulogne and the adjacent country. His fleets rode triumphant in the channel, commanded the mouths of the Seine and of the Rhine, ravaged the coasts of the ocean, and diffused, beyond the columns of Hercules, the terror of his name. Under his command, Britain, destined in a future age to obtain the empire of the sea, already assumed its natural and respectable station of a maritime power.1279

By seizing the fleet of Boulogne, Carausius had deprived his master of the means of pursuit and revenge. AD 289 And when, after a vast expense of time and labor, a new armament was launched into the water,1280 the Imperial troops, unaccustomed to that element, were easily baffled and defeated by the veteran sailors of the usurper. This disappointed effort was soon productive of a treaty of peace. Diocletian and his colleague, who justly dreaded the enterprising spirit of Carausius, resigned to him the sovereignty of Britain, and reluctantly admitted their perfidious servant to a participation of the Imperial honors.1281 But the adoption of the two Caesars restored new vigor to the Romans arms; and while the Rhine was guarded by the presence of Maximian, his brave associate, Constantius, assumed the conduct of the British war. His first enterprise was against the important place of Boulogne. A stupendous mole, raised across the entrance of the harbor, intercepted all hopes of relief. AD 292 The town surrendered after an obstinate defence; and a considerable part of the naval strength of Carausius fell into the hands of the besiegers. During the three years which Constantius employed in preparing a fleet adequate to the conquest of Britain, he secured the coast of Gaul, invaded the country of the Franks, and deprived the usurper of the assistance of those powerful allies.

AD 293 Before the preparations were finished, Constantius received the intelligence of the tyrant’s death, and it was considered as a sure presage of the approaching victory. The servants of Carausius imitated the example of treason which he had given. He was murdered by his first minister Allectus, and the assassin succeeded to his power and to his danger. But he possessed not equal abilities either to exercise the one, or to repel the other. He beheld, with anxious terror, the opposite shores of the continent, already filled with arms, with troops, and with vessels; for Constantius had very prudently divided his forces, that he might likewise divide the attention and resistance of the enemy. AD 296 The attack was at length made by the principal squadron, which, under the command of the prefect Asclepiodatus, an officer of distinguished merit, had been assembled in the mouth of the Seine. So imperfect in those times was the art of navigation that orators have celebrated the daring courage of the Romans, who ventured to set sail with a side-wind, and on a stormy day. The weather proved favorable to their enterprise. Under the cover of a thick fog, they escaped the fleet of Allectus, which had been stationed off the Isle of Wight to receive them, landed in safety on some part of the western coast, and convinced the Britons that a superiority of naval strength will not always protect their country from a foreign invasion. Asclepiodatus had no sooner disembarked the Imperial troops then he set fire to his ships; and, as the expedition proved fortunate, his heroic conduct was universally admired. The usurper had posted himself near London, to expect the formidable attack of Constantius, who commanded in person the fleet of Boulogne; but the descent of a new enemy required his immediate presence in the West. He performed this long march in so precipitate a manner that he encountered the whole force of the prefect with a small body of harassed and disheartened troops. The engagement was soon terminated by the total defeat and death of Allectus; a single battle, as it has often happened, decided the fate of this great island; and when Constantius landed on the shores of Kent, he found them covered with obedient subjects. Their acclamations were loud and unanimous; and the virtues of the conqueror may induce us to believe that they sincerely rejoiced in a revolution which, after a separation of ten years, restored Britain to the body of the Roman empire.1282

Britain had none but domestic enemies to dread; and as long as the governors preserved their fidelity, and the troops their discipline, the incursions of the naked savages of Scotland or Ireland could never materially affect the safety of the province. The peace of the continent, and the defence of the principal rivers which bounded the empire, were objects of far greater difficulty and importance. The policy of Diocletian, which inspired the councils of his associates, provided for the public tranquility, by encouraging a spirit of dissension among the barbarians, and by strengthening the fortifications of the Roman limit. In the East he fixed a line of camps from Egypt to the Persian dominions, and, for every camp, he instituted an adequate number of stationary troops, commanded by their respective officers, and supplied with every kind of arms, from the new arsenals which he had formed at Antioch, Emesa, and Damascus.1283 Nor was the precaution of the emperor less watchful against the well-known valor of the barbarians of Europe. From the mouth of the Rhine to that of the Danube, the ancient camps, towns, and citidels were diligently reestablished, and, in the most exposed places, new ones were skilfully constructed; the strictest vigilance was introduced among the garrisons of the frontier, and every expedient was practised that could render the long chain of fortifications firm and impenetrable.1284 A barrier so respectable was seldom violated, and the barbarians often turned against each other their disappointed rage. The Goths, the Vandals, the Gepidae, the Burgundians, the Alemanni, wasted each other’s strength by destructive hostilities: and whosoever vanquished, they vanquished the enemies of Rome. The subjects of Diocletian enjoyed the bloody spectacle, and congratulated each other that the mischiefs of civil war were now experienced only by the barbarians.1285

Notwithstanding the policy of Diocletian, it was impossible to maintain an equal and undisturbed tranquillity during a reign of twenty years, and along a frontier of many hundred miles. Sometimes the barbarians suspended their domestic animosities, and the relaxed vigilance of the garrisons sometimes gave a passage to their strength or dexterity. Whenever the provinces were invaded, Diocletian conducted himself with that calm dignity which he always affected or possessed; reserved his presence for such occasions as were worthy of his interposition, never exposed his person or reputation to any unnecessary danger, insured his success by every means that prudence could suggest, and displayed, with ostentation, the consequences of his victory. In wars of a more difficult nature, and more doubtful event, he employed the rough valor of Maximian; and that faithful soldier was content to ascribe his own victories to the wise counsels and auspicious influence of his benefactor. But after the adoption of the two Caesars, the emperors, themselves retiring to a less laborious scene of action, devolved on their adopted sons the defence of the Danube and of the Rhine. The vigilant Galerius was never reduced to the necessity of vanquishing an army of barbarians on the Roman territory.1286 The brave and active Constantius delivered Gaul from a very furious inroad of the Alemanni; and his victories of Langres and Vindonissa appear to have been actions of considerable danger and merit. As he traversed the open country with a feeble guard he was encompassed on a sudden by the superior multitude of the enemy. He retreated with difficulty towards Langres; but, in the general consternation, the citizens refused to open their gates, and the wounded prince was drawn up the wall by the means of a rope. But on the news of his distress the Roman troops hastened from all sides to his relief, and before the evening he had satisfied his honor and revenge by the slaughter of six thousand Alemanni.1287 From the monuments of those times, the obscure traces of several other victories over the barbarians of Sarmatia and Germany might possibly be collected; but the tedious search would not be rewarded either with amusement or with instruction.

The conduct which the emperor Probus had adopted in the disposal of the vanquished was imitated by Diocletian and his associates. The captive barbarians, exchanging death for slavery, were distributed among the provincials, and assigned to those districts (in Gaul, the territories of Amiens, Beauvais, Cambray, Treves, Langres, and Troyes are particularly specified)1288 which had been depopulated by the calamities of war. They were usefully employed as shepherds and husbandmen, but were denied the exercise of arms, except when it was found expedient to enroll them in the military service. Nor did the emperors refuse the property of lands, with a less servile tenure, to such of the barbarians as solicited the protection of Rome. They granted a settlement to several colonies of the Carpi, the Bastarnae, and the Sarmatians; and, by a dangerous indulgence, permitted them in some measure to retain their national manners and independence.1289 Among the provincials, it was a subject of flattering exultation, that the barbarian, so lately an object of terror, now cultivated their lands, drove their cattle to the neighboring fair, and contributed by his labor to the public plenty. They congratulated their masters on the powerful accession of subjects and soldiers; but they forgot to observe that multitudes of secret enemies, insolent from favor, or desperate from oppression, were introduced into the heart of the empire.1290

While the Caesars exercised their valor on the banks of the Rhine and Danube, the presence of the emperors was required on the southern confines of the Roman world. From the Nile to Mount Atlas, Africa was in arms. A confederacy of five Moorish nations issued from their deserts to invade the peaceful provinces.1291 Julian had assumed the purple at Carthage,1292 Achilleus at Alexandria; and even the Blemmyes renewed, or rather continued, their incursions into the Upper Egypt. Scarcely any circumstances have been preserved of the exploits of Maximian in the western parts of Africa; but it appears, by the event, that the progress of his arms was rapid and decisive, that he vanquished the fiercest barbarians of Mauritania, and that he removed them from the mountains, whose inaccessible strength had inspired their inhabitants with a lawless confidence, and habituated them to a life of rapine and violence.1293 Diocletian, on his side, opened the campaign in Egypt by the siege of Alexandria, cut off the aqueducts which conveyed the waters of the Nile into every quarter of that immense city,1294 and, rendering his camp impregnable to the sallies of the besieged multitude, he pushed his reiterated attacks with caution and vigor. After a siege of eight months, Alexandria, wasted by the sword and by fire, implored the clemency of the conqueror, but it experienced the full extent of his severity. Many thousands of the citizens perished in a promiscuous slaughter, and there were few obnoxious persons in Egypt who escaped a sentence either of death or at least of exile.1295 The fate of Busiris and of Coptos was still more melancholy than that of Alexandria: those proud cities, the former distinguished by its antiquity, the latter enriched by the passage of the Indian trade, were utterly destroyed by the arms and by the severe order of Diocletian.1296 The character of the Egyptian nation, insensible to kindness, but extremely susceptible of fear, could alone justify this excessive rigor. The seditions of Alexandria had often affected the tranquillity and subsistence of Rome itself. Since the usurpation of Firmus, the province of Upper Egypt, incessantly relapsing into rebellion, had embraced the alliance of the savages of Aethiopia. The number of the Blemmyes, scattered between the Island of Meroe and the Red Sea, was very inconsiderable, their disposition was unwarlike, their weapons rude and inoffensive.1297 Yet in the public disorders these barbarians, whom antiquity, shocked with the deformity of their figure, had almost excluded from the human species, presumed to rank themselves among the enemies of Rome.1298 Such had been the unworthy allies of the Egyptians; and while the attention of the state was engaged in more serious wars, their vexatious inroads might again harass the repose of the province. With a view of opposing to the Blemmyes a suitable adversary, Diocletian persuaded the Nobatae, or people of Nubia, to remove from their ancient habitations in the deserts of Libya, and resigned to them an extensive but unprofitable territory, above Syene and the cataracts of the Nile, with the stipulation that they should ever respect and guard the frontier of the empire. The treaty long subsisted; and till the establishment of Christianity introduced stricter notions of religious worship, it was annually ratified by a solemn sacrifice in the isle of Elephantine, in which the Romans, as well as the barbarians, adored the same visible or invisible powers of the universe.1299