the official religion of the empire with the joint promulgation of the Edict of Thessalonica, establishing Nicene Christianity as the state religion and as the state church of the Roman Empire on 27 February 380. After this began state persecution of non-Nicene Christians, including Arian and Nontrinitarian devotees. When Augustine became coadjutor Bishop of Hippo in 395, both Donatist and Catholic parties had, for decades, existed side-by-side, with a double line of bishops for the same cities, all competing for the loyalty of the people. Augustine was distressed by the ongoing schism, but he held the view that belief cannot be compelled, so he appealed to the Donatists using popular propaganda, debate, personal appeal, General Councils, appeals to the emperor and political pressure, but all attempts failed. The Donatists fomented protests and street violence, accosted travelers, attacked random Catholics without warning, often doing serious and unprovoked bodily harm such as beating people with clubs, cutting off their hands and feet, and gouging out eyes while also inviting their own martyrdom. By 408, Augustine supported the state's use of force against them. Historian Frederick Russell says that Augustine did not believe this would "make the Donatists more virtuous" but he did believe it would make them "less vicious". Augustine wrote that there had, in the past, been ten Christian persecutions, beginning with the Neronian persecution, and alleging persecutions by the emperors Domitian, Trajan, "Antoninus" (Marcus Aurelius), "Severus" (Septimius Severus), and Maximinus (Thrax), as well as Decian and Valerianic persecutions, and then another by Aurelian as well as by Diocletian and Maximian. These ten persecutions Augustine compared with the 10 Plagues of Egypt in the Book of Exodus. Augustine did not see these early persecutions in the same light as that of fourth century heretics. In Augustine's view, when the purpose of persecution is to "lovingly correct and instruct", then it becomes discipline and is just. Augustine wrote that "coercion cannot transmit the truth to the heretic, but it can prepare them to hear and receive the truth". He said the church would discipline its people out of a loving desire to heal them, and that, "once compelled to come in, heretics would gradually give their voluntary assent to the truth of Christian orthodoxy." He opposed the severity of Rome and the execution of heretics. It is his teaching on coercion that has literature on Augustine frequently referring to him as le