Editing 253 (section)

== Events ==
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=== By place ===
==== Roman Empire ====
* The [[Roman legion|legions]] who have campaigned against the [[Goths]] on the [[Danube]] elect [[Marcus Aemilius Aemilianus]] as new emperor. He advances on [[Ancient Rome|Rome]] along the [[Via Flaminia|Flaminian Way]], to meet his opponent emperor [[Trebonianus Gallus]] and his son [[Volusianus]]. For the most part, generals in the border regions are proclaimed [[Roman emperor|emperor]] by their armies to halt the invasion of [[Germanic peoples|Germanic tribes]]. 
* Aemilianus is proclaimed "enemy of the State" by the [[Roman Senate]]. Trebonianus Gallus is defeated at [[Terni|Interamna Nahars]] ([[Umbria]]); he flees with Volusianus to the north, but at [[Foligno]] they are killed by their own troops.
* Aemilianus rules the Roman Empire for three months; he promises to fight in [[Thrace]] and goes to war against [[Sassanid Empire|Persia]]. The Senate gives him the rank of ''[[Pontifex Maximus]]''. 
* Aemilianus is murdered at [[Spoleto|Spoletium]] and [[Valerian (emperor)|Publius Valerianus]], age 60, is recognised as the new emperor by the [[Rhine]] legions. He gives his son [[Gallienus|Publius Licinius Egnatius Gallienus]] the title ''[[Augustus (title)|Augustus]]''. Valerianus I dispatches him to the Danube where the Goths have violated the treaty signed with Rome and invaded [[Moesia]].
* Valerianus I splits the Roman Empire in two; Gallienus taking control of the West and his father ruling the East, where he faces the [[Sassanid Empire|Persian]] threat.
* [[Battle of Barbalissos]]: King [[Shapur I]], defeats a Roman field army at [[Barbalissos]] in [[Syria]].<ref>{{cite book|last1=Slootjes|first1=Daniëlle|last2=Peachin|first2=M.|title=Rome and the Worlds beyond Its Frontiers|date=2016|publisher=BRILL|isbn=9789004326750|page=40|url=https://books.google.com/books?id=PtU6DQAAQBAJ&pg=PA40|language=en}}</ref>
* [[Valerian (emperor)|Valerian]] reforms [[Legio III Augusta|Legio III ''Augusta'']] to fight the "five peoples", a dangerous [[coalition]] of [[Berber peoples|Berber tribes]] in [[Africa (Roman province)|Africa]].

=== By topic ===
==== Religion ====
* [[Pope Cornelius]] is sent into exile.<ref name=Cornelius>{{cite web|title=Saint Cornelius - pope|url=https://www.britannica.com/biography/Saint-Cornelius|website=Encyclopedia Britannica|access-date=17 April 2018|language=en}}</ref>
* [[June 25]] &ndash; [[Pope Lucius I]] succeeds [[Pope Cornelius]] as the 22nd [[pope]].<ref name=Lucius>{{cite web|title=Saint Lucius I - pope|url=https://www.britannica.com/biography/Saint-Lucius-I|website=Encyclopedia Britannica|access-date=17 April 2018|language=en}}</ref>
* Lucius is arrested almost immediately following his election and also exiled.<ref name=Lucius />