After several weak or tyrannic reigns, the Roman Empire had a good emperor in Probus, whom the legions massacred, and elected Carus, who was struck dead by lightning while making war against the Persians. His son, Numerianus, was proclaimed by the soldiers. The historians tell us seriously that he lost his sight by weeping for the death of his father, and that he was obliged to be carried along with the army, shut up in a close litter. His father-in-law Aper killed him in his bed, to place himself on the throne; but a druid had predicted in Gaul to Diocletian, one of the generals of the army, that he would become emperor after having killed a boar. A boar, in Latin, is aper. Diocletian assembled the army, killed Aper with his own hands in the presence of the soldiers, and thus accomplished the prediction of the druid. The historians who relate this oracle deserve to be fed on the fruit of the tree which the druids revered. It is certain that Diocletian killed the father-in-law of the emperor, which was his first right to the throne. Numerianus had a brother named Carinus, who was also emperor, but being opposed to the elevation of Diocletian, he was killed by one of the tribunes of his army, which formed his second pretension to the purple. These were Diocletian’s rights to the throne, and for a long time he had no other.

He was originally of Dalmatia, of the little town of Dioclea, of which he took the name. If it be true that his father was a laborer, and that he himself in his youth had been a slave to a senator named Anulinus, the fact forms his finest eulogium. He could have owed his elevation to himself alone; and it is very clear that he had conciliated the esteem of his army, since they forgot his birth to give him the diadem. Lactantius, a Christian authority, but rather partial, pretends that Diocletian was the greatest poltroon of the empire. It is not very likely that the Roman soldiers would have chosen a poltroon to govern them, or that this poltroon would have passed through all the degrees of the army. The zeal of Lactantius against a pagan emperor is very laudable, but not judicious.

Diocletian continued for twenty years the master of those fierce legions, who dethroned their emperors with as much facility as they created them; which is another proof, notwithstanding Lactantius, that he was as great a prince as he was a brave soldier. The empire under him soon regained its pristine splendor. The Gauls, the Africans, Egyptians, and British, who had revolted several times, were all brought under obedience to the empire; even the Persians were vanquished. So much success without; a still more happy administration within; laws as humane as wise, which still exist in the Justinian code; Rome, Milan, Autun, Nicomedia, Carthage, embellished by his munificence; all tended to gain him the love and respect both of the East and West; so that, two hundred and forty years after his death, they continued to reckon and date from the first year of his reign, as they had formerly dated from the foundation of Rome. This is what is called the era of Diocletian; it has also been called the era of martyrs; but this is a mistake of eighteen years, for it is certain that he did not persecute any Christian for eighteen years. So far from it, the first thing he did, when emperor, was to give a company of pr?torian guards to a Christian named Sebastian, who is in the list of the saints.

He did not fear to give a colleague to the empire in the person of a soldier of fortune, like himself; it was Maximian Hercules, his friend. The similarity of their fortunes had caused their friendship. Maximian was also born of poor and obscure parents, and had been elevated like Diocletian, step by step, by his own courage. People have not failed to reproach this Maximian with taking the surname of Hercules, and Diocletian with accepting that of Jove. They do not condescend to perceive that we have clergymen every day who call themselves Hercules, and peasants denominated C?sar and Augustus.

Diocletian created two C?sars; the first was another Maximian, surnamed Galerius, who had formerly been a shepherd. It seemed that Diocletian, the proudest of men and the first introducer of kissing the imperial feet, showed his greatness in placing C?sars on the throne from men born in the most abject condition. A slave and two peasants were at the head of the empire, and never was it more flourishing.

The second C?sar whom he created was of distinguished birth. He was Constantius Chlorus, great-nephew, on his mother’s side, to the emperor Claudius II. The empire was governed by these four princes; an association which might have produced four civil wars a year, but Diocletian knew so well how to be master of his colleagues, that he obliged them always to respect him, and even to live united among themselves. These princes, with the name of C?sars were in reality no more than his subjects. It is seen that he treated them like an absolute sovereign; for when the C?sar Galerius, having been conquered by the Persians, went into Mesopotamia to give him the account of his defeat, he let him walk for the space of a mile near his chariot, and did not receive him into favor until he had repaired his fault and misfortune.

Galerius retrieved them the year after, in 297, in a very signal manner. He vanquished the king of Persia in person.

These kings of Persia had not been cured, by the battle of Arbela, of carrying their wives, daughters, and eunuchs along with their armies. Galerius, like Alexander, took his enemy’s wife and all his family, and treated them with the same respect. The peace was as glorious as the victory. The vanquished ceded five provinces to the Romans, from the sands of Palmyra to Armenia.

Diocletian and Galerius went to Rome to dazzle the inhabitants with a triumph till then unheard of. It was the first time that the Roman people had seen the wife and children of a king of Persia in chains. All the empire was in plenty and prosperity. Diocletian went through all the provinces, from Rome to Egypt, Syria, and Asia Minor. His ordinary residence was not at Rome, but at Nicomedia, near the Euxine Sea, either to watch over the Persians and the barbarians, or because he was attached to a retreat which he had himself embellished. It was in the midst of this prosperity that Galerius commenced the persecution against the Christians. Why had he left them in repose until then, and why were they then ill treated? Eusebius says that a centurion of the Trajan legion, named Marcellus, who served in Mauritania, assisting with his troop at a feast given in honor of the victory of Galerius, threw his military sash, his arms, and his branch of vine, on the ground, and cried out loudly that he was a Christian and that he would no longer serve pagans — a desertion which was punished with death by the council of war. This was the first known example of the famous persecution of Diocletian. It is true that there were a great number of Christians in the armies of the empire, and the interest of the state ............