Troubles After The Abdication Of Diocletian. -- Death Of Constantius. -- Elevation Of Constantine And Maxen Tius. - Six Emperors At The Same Time. -- Death Of Maximian And Galerius. -- Victories Of Constantine Over Maxentius And Licinus. -- Reunion Of The Empire Under The Authority Of Constantine.
The balance of power established by Diocletian subsisted no longer than while it was sustained by the firm and dexterous hand of the founder. It required such a fortunate mixture of different tempers and abilities, as could scarcely be found or even expected a second time; two emperors without jealousy, two Cæsars without ambition, and the same general interest invariably pursued by four independent princes. The abdication of Diocletian and Maximian was succeeded by eighteen years of discord and confusion. The empire was afflicted by five civil wars; and the remainder of the time was not so much a state of tranquillity as a suspension of arms between several hostile monarchs, who, viewing each other with an eye of fear and hatred, strove to increase their respective forces at the expense of their subjects.
As soon as Diocletian and Maximian had resigned the purple, their station, according to the rules of the new constitution, was filled by the two Cæsars, Constantius and Galerius, who immediately assumed the title of Augustus.
The honors of seniority and precedence were allowed to the former of those princes, and he continued under a new appellation to administer his ancient department of Gaul, Spain, and Britain. The government of those ample provinces was sufficient to exercise his talents and to satisfy his ambition. Clemency, temperance, and moderation, distinguished the amiable character of Constantius, and his fortunate subjects had frequently occasion to compare the virtues of their sovereign with the passions of Maximian, and even with the arts of Diocletian. Instead of imitating their eastern pride and magnificence, Constantius preserved the modesty of a Roman prince. He declared, with unaffected sincerity, that his most valued treasure was in the hearts of his people, and that, whenever the dignity of the throne, or the danger of the state, required any extraordinary supply, he could depend with confidence on their gratitude and liberality. The provincials of Gaul, Spain, and Britain, sensible of his worth, and of their own happiness, reflected with anxiety on the declining health of the emperor Constantius, and the tender age of his numerous family, the issue of his second marriage with the daughter of Maximian.
The stern temper of Galerius was cast in a very different mould; and while he commanded the esteem of his subjects, he seldom condescended to solicit their affections. His fame in arms, and, above all, the success of the Persian war, had elated his haughty mind, which was naturally impatient of a superior, or even of an equal. If it were possible to rely on the partial testimony of an injudicious writer, we might ascribe the abdication of Diocletian to the menaces of Galerius, and relate the particulars of a private conversation between the two princes, in which the former discovered as much pusillanimity as the latter displayed ingratitude and arrogance. But these obscure anecdotes are sufficiently refuted by an impartia view of the character and conduct of Diocletian. Whatever might otherwise have been his intentions, if he had apprehended any danger from the violence of Galerius, his good sense would have instructed him to prevent the ignominious contest; and as he had held the sceptre with glory, he would have resigned it without disgrace.
After the elevation of Constantius and Galerius to the rank of Augusti, two new Csars were required to supply their place, and to complete the system of the Imperial government. Diocletian, was sincerely desirous of withdrawing himself from the world; he considered Galerius, who had married his daughter, as the firmest support of his family and of the empire; and he consented, without reluctance, that his successor should assume the merit as well as the envy of the important nomination. It was fixed without consulting the interest or inclination of the princes of the West. Each of them had a son who was arrived at the age of manhood, and who might have been deemed the most natural candidates for the vacant honor. But the impotent resentment of Maximian was no longer to be dreaded; and the moderate Constantius, though he might despise the dangers, was humanely apprehensive of the calamities, of civil war. The two persons whom Galerius promoted to the rank of Cæsar, were much better suited to serve the views of his ambition; and their principal recommendation seems to have consisted in the want of merit or personal consequence. The first of these was Daza, or, as he was afterwards called, Maximin, whose mother was the sister of Galerius. The unexperienced youth still betrayed, by his manners and language, his rustic education, when, to his own astonishment, as well as that of the world, he was invested by Diocletian with the purple, exalted to the dignity of Cæsar, and intrusted with the sovereign command of Egypt and Syria. At the same time, Severus, a faithful servant, addicted to pleasure, but not incapable of business, was sent to Milan, to receive, from the reluctant hands of Maximian, the Cæsarian ornaments, and the possession of Italy and Africa. According to the forms of the constitution, Severus acknowledged the supremacy of the western emperor; but he was absolutely devoted to the commands of his benefactor Galerius, who, reserving to himself the intermediate countries from the confines of Italy to those of Syria, firmly established his power over three fourths of the monarchy. In the full confidence that the approaching death of Constantius would leave him sole master of the Roman world, we are assured that he had arranged in his mind a long succession of future princes, and that he meditated his own retreat from public life, after he should have accomplished a glorious reign of about twenty years.
But within less than eighteen months, two unexpected revolutions overturned the ambitious schemes of Galerius. The hopes of uniting the western provinces to his empire were disappointed by the elevation of Constantine, whilst Italy and Africa were lost by the successful revolt of Maxentius.
The British expedition, and an easy victory over the barbarians of Caledonia, were the last exploits of the reign of Constantius. He ended his life in the Imperial palace of York, fifteen months after he had received the title of Augustus, and almost fourteen years and a half after he had been promoted to the rank of Cæsar. His death was immediately succeeded by the elevation of Constantine. The ideas of inheritance and succession are so very familiar, that the generality of mankind consider them as founded, not only in reason, but in nature itself. Our imagination readily transfers the same principles from private property to public dominion: and whenever a virtuous father leaves behind him a son whose merit seems to justify the esteem, or even the hopes, of the people, the joint influence of prejudice and of affection operates with irresistible weight. The flower of the western armies had followed Constantius into Britain, and the national troops were reenforced by a numerous body of Alemanni, who obeyed the orders of Crocus, one of their hereditary chieftains. The opinion of their own importance, and the assurance that Britain, Gaul, and Spain would acquiesce in their nomination, were diligently inculcated to the legions by the adherents of Constantine. The soldiers were asked, whether they could hesitate a moment between the honor of placing at their head the worthy son of their beloved emperor, and the ignominy of tamely expecting the arrival of some obscure stranger, on whom it might please the sovereign of Asia to bestow the armies and provinces of the West. It was insinuated to them, that gratitude and liberality held a distinguished place among the virtues of Constantine; nor did that artful prince show himself to the troops, till they were prepared to salute him with the names of Augustus and Emperor. The throne was the object of his desires; and had he been less actuated by ambition, it was his only means of safety. He was well acquainted with the character and sentiments of Galerius, and sufficiently apprised, that if he wished to live he must determine to reign. The decent and even obstinate resistance which he chose to affect, was contrived to justify his usurpation; nor did he yield to the acclamations of the army, till he had provided the proper materials for a letter, which he immediately despatched to the emperor of the East. Constantine informed him of the melancholy event of his father's death, modestly asserted his natural claim to the succession, and respectfully lamented, that the affectionate violence of his troops had not permitted him to solicit the Imperial purple in the regular and constitutional manner. The first emotions of Galerius were those of surprise, disappointment, and rage; and as he could seldom restrain his passions, he loudly threatened, that he would commit to the flames both the letter and the messenger. But his resentment insensibly subsided; and when he recollected the doubtful chance of war, when he had weighed the character and strength of his adversary, he consented to embrace the honorable accommodation which the prudence of Constantine had left open to him. Without either condemning or ratifying the choice of the British army, Galerius accepted the son of his deceased colleague as the sovereign of the provinces beyond the Alps; but he gave him only the title of Cæsar, and the fourth rank among the Roman princes, whilst he conferred the vacant place of Augustus on his favorite Severus. The apparent harmony of the empire was still preserved, and Constantine, who already possessed the substance, expected, without impatience, an opportunity of obtaining the honors, of supreme power.
The children of Constantius by his second marriage were six in number, three of either sex, and whose Imperial descent might have solicited a preference over the meaner extraction of the son of Helena. But Constantine was in the thirty-second year of his age, in the full vigor both of mind and body, at the time when the eldest of his brothers could not possibly be more than thirteen years old. His claim of superior merit had been allowed and ratified by the dying emperor. In his last moments Constantius bequeathed to his eldest son the care of the safety as well as greatness of the family; conjuring him to assume both the authority and the sentiments of a father with regard to the children of Theodora. Their liberal education, advantageous marriages, the secure dignity of their lives, and the first honors of the state with which they were invested, attest the fraternal affection of Constantine; and as those princes possessed a mild and grateful disposition, they submitted without reluctance to the superiority of his genius and fortune.
Maxentius was the son of the emperor Maximian, and he had married the daughter of Galerius. His birth and alliance seemed to offer him the fairest promise of succeeding to the empire; but his vices and incapacity procured him the same exclusion from the dignity of Cæsar, which Constantine had deserved by a dangerous superiority of merit. The policy of Galerius preferred such associates as would never disgrace the choice, nor dispute the commands, of their benefactor. An obscure stranger was therefore raised to the throne of Italy, and the son of the late emperor of the West was left to enjoy the luxury of a private fortune in a villa a few miles distant from the capital. The gloomy passions of his soul, shame, vexation, and rage, were inflamed by envy on the news of Constantine's success; but the hopes of Maxentius revived with the public discontent, and he was easily persuaded to unite his personal injury and pretensions with the cause of the Roman people. Two Prætorian tribunes and a commissary of provisions undertook the management of the conspiracy; and as every order of men was actuated by the same spirit, the immediate event was neither doubtful nor difficult. The præfect of the city, and a few magistrates, who maintained their fidelity to Severus, were massacred by the guards; and Maxentius, invested with the Imperial ornaments, was acknowledged by the applauding senate and people as the protector of the Roman freedom and dignity. It is uncertain whether Maximian was previously acquainted with the conspiracy; but as soon as the standard of rebellion was erected at Rome, the old emperor broke from the retirement where the authority of Diocletian had condemned him to pass a life of melancholy and solitude, and concealed his returning ambition under the disguise of paternal tenderness. At the request of his son and of the senate, he condescended to reassume the purple. His ancient dignity, his experience, and his fame in arms, added strength as well as reputation to the party of Maxentius.
According to the advice, or rather the orders, of his colleague, the emperor Severus immediately hastened to Rome, in the full confidence, that, by his unexpected celerity, he should easily suppress the tumult of an unwarlike populace, commanded by a licentious youth. But he found on his arrival the gates of the city shut against him, the walls filled with men and arms, an experienced general at the head of the rebels, and his own troops without spirit or affection. A large body of Moors deserted to the enemy, allured by the promise of a large donative; and, if it be true that they had been levied by Maximian in his African war, preferring the natural feelings of gratitude to the artificial ties of allegiance. Anulinus, the Prætorian præfect, declared himself in favor of Maxentius, and drew after him the most considerable part of the troops, accustomed to obey his commands. Rome, according to the expression of an orator, recalled her armies; and the unfortunate Severus, destitute of force and of counsel, retired, or rather fled, with precipitation, to Ravenna. Here he might for some time have been safe. The fortifications of Ravenna were able to resist the attempts, and the morasses that surrounded the town, were sufficient to prevent the approach, of the Italian army. The sea, which Severus commanded with a powerful fleet, secured him an inexhaustible supply of provisions, and gave a free entrance to the legions, which, on the return of spring, would advance to his assistance from Illyricum and the East. Maximian, who conducted the siege in person, was soon convinced that he might waste his time and his army in the fruitless enterprise, and that he had nothing to hope either from force or famine. With an art more suitable to the character of Diocletian than to his own, he directed his attack, not so much against the walls of Ravenna, as against the mind of Severus. The treachery which he had experienced disposed that unhappy prince to distrust the most sincere of his friends and adherents. The emissaries of Maximian easily persuaded his credulity, that a conspiracy was formed to betray the town, and prevailed upon his fears not to expose himself to the discretion of an irritated conqueror, but to accept the faith of an honorable capitulation. He was at first received with humanity and treated with respect. Maximian conducted the captive emperor to Rome, and gave him the most solemn assurances that he had secured his life by the resignation of the purple. But Severus, could obtain only an easy death and an Imperial funeral. When the sentence was signified to him, the manner of executing it was left to his own choice; he preferred the favorite mode of the ancients, that of opening his veins; and as soon as he expired, his body was carried to the sepulchre which had been constructed for the family of Gallienus.