The Watchtower Society quotes sceular sources only when it coincides with their false doctrines and then they misquote them:
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w519/1 p.518 Hated for His Name*** Diocletian assumed the crown A.D. 284. At first he seemed friendly to the Christians, but in the year 303 he gave in to persuasion and opened the tenth persecution, probably the most ferocious of all. Suffocation by smoke, forcible drinking of melted lead, mass drownings and burnings, breaking on the rack of men and women alike ran the empire with blood. In a single month 17,000 were slain. In the province of Egypt alone, 144,000 such professed Christians died by violence in the course of this persecution, in addition to another 700,000 who died as a result of fatigues encountered in banishment or under enforced public works.
—Fox's Book of Martyrs
Diocletian mounted the imperial throne, AD 284; at first he showed great favor to the Christians.
In the year of Christ 286, a most remarkable affair occurred; legion of soldiers, consisting of six thousand six hundred and sixty-six men, contained none but Christians. This legion was called the Theban Legion, because the men had been raised in Thebias: they were quartered in the east until the emperor Maximian ordered them to march to Gaul, to assist him against the rebels of Burgundy. They passed the Alps into Gaul, under the command of Mauritius, Candidus, and Exupernis, their worthy commanders, and at length joined the emperor. Maximian, about this time, ordered a general sacrifice, at which the whole army was to assist; and like-wise he commanded that they should take the oath of allegiance and swear, at the same time, to assist in the extirpation of Christianity in Gaul. Alarmed at these orders, each individual of the Theban Legion absolutely refused either to sacrifice or take the oaths precribed. This so greatly enraged Maximian, that he ordered the legion to be decimated, that is, every tenth man to be selected from the rest, and put to the sword. This bloody order having been put in execution, those who remained alive were still inflexible, when a second decimation took place, and every tenth man of those living was put to death. This second severity made no more impression than the first had done; the soldiers preserved their fortitude and their principles, but by the advice of their officers they drew up a loyal remonstrance to the emperor. This, it might have been presumed, would have softened the emperor, but it had a contrary effect: for, enraged at their perseverance and unanimity, he commanded that the whole legion should he put to death, which was accordingly executed by the other troops, who cut them to pieces with their swords, September 22, 286.
The Tenth Persecution, Under Diocletian, AD 303 — Fox's Book of Martyrs
A city of Phrygia, consisting entirely of Christians, was burnt, and all the inhabitants perished in the flames.
Sebastian, a celebrated martyr, was born at Narbonne, in Gaul, instructed in the principles of Christianity at Milan, and afterward became an officer of the emperor's guard at Rome. He remained a true Christian in the midst of idolatry; unallured by the splendors of a court, untainted by evil examples, and uncontaminated by the hopes of preferment. Refusing to be a pagan, the emperor ordered him be taken to a field near the city, termed the Campus Martius, and there to be shot to death with arrows; which sentence was executed accordingly. Some pious Christians coming to the place of execution, in order to give his body burial, perceived signs of life in him, and immediately moving him to a place of security, they, in short time effected his recovery, and prepared him for a second martyrdom; for, as soon as he was able to go out, he placed himself intentionally in the emperor's way as he was going to the temple, aprehended him for his various cruelties and unreasonable prejudices against Christianity. As soon as Diocletian had overcome his surprise, he ordered Sebastian to be seized, and carried to a place near the palace, and beaten to death; and, that the Christians should not either use means again to recover or bury his body, he ordered that it should be thrown into the common sewer. Nevertheless, a Christian lady, named Lucina, found means to remove it from the sewer, and bury it in the catacombs, or repositories of the dead.
The Christians, about this time, upon mature consideration, thought it unlawful to bear arms under a heathen emperor.Maximilian, the son of Fabius Victor, was the first beheaded under this regulation.