Roman Timeline of the 3rd Century AD

Year	Event
203 AD	Completion of the Arch of Septimus Severus in the Roman Forum.
204 AD	Birth of the Emperor Philip the Arab. Christian writer Tertullian completes his work The Crown.
204 AD	Secular Games (Ludi saeculares) celebrated throughout the Empire
205 AD	First consulship of the Roman historian Dio Cassius.
207 AD	Birth of the Emperor Aemilian on the island Jerba in Africa.
208 AD	Birth of the Emperor Alexander Severus, in the city of Caesarea.
209 AD	Emperor Septimus Severus campaigns in Britain against the Caledonians.
211 AD	Death of Septimius Severus in Britain. Caracalla and Geta, Severus' sons rule as joint emperors. Geta murdered by Caracalla 10 months later making him sole emperor.
212 AD	The Constitutio Antoniniana, issued by Caracalla, confers citizenship on all free men in the Empire.
213 AD	Birth of the Emperor Gallienus.
214 AD	Birth of the Emperor Aurelian, in the province of Lower Moesia.
215 AD	The Emperor Caracalla issues a new form of silver coinage, the Antoninianus.
216 AD	New wars against Parthia. The baths of Caracalla are completed in Rome. Caracalla makes concessions to the Jews, exempting them from taxes for the first time since Julius Caesar.
217 AD	Death of the Emperor Caracalla (Assassinated by Julius Martialis, an officer of the imperial bodyguard). Macrinus, the Praetorian Prefect under Caracalla, is hailed by the troops as the new emperor. He is the first emperor to be drawn out of the Roman Ordo Equester.
218 AD	Marcrinus defeated by rebel forces near Antioch and executed. Elagabalus, nephew of Caracalla, is hailed as emperor after the defeat of Macrinus.
220 AD	Emperor Elagabalus establishes the Syrian sun god of whom he is priest, El Gabal, as a major Roman god.
222 AD	Elagabalus is murdered while in a latrine by the Praetorian Guard. Severus Alexander is hailed as the new emperor of Rome.
224 AD	Birth of the Emperor Carus, who was born in the city of Narbo in Gaul.
225 AD	Birth of the Emperor Gordian III.
230 - 232 AD	The Sassanid dynasty of Persia launches a war to reconquer lost lands in the Roman east.
232 AD	Birth of the Emperor Probus, in the town of Sirmium.
233 AD	Alexander Severus begins to campaign against the Alemmani on the Rhine.
234 AD	Pannonian troops proclaim Maximinus Thrax as emperor.
235 AD	Death of the Emperor Alexander Severus, who was killed when his troops mutinied near the town of Moguntiacum. Maximinus Thrax is recognized by the senate as emperor. Thrax continues the campaign against the Alemmani successfully.
235 AD	Death of the historian Dio Cassius.
235 AD	Gordianus I and Gordianus II assume emperorship of North Africa.
236 - 237 AD	Maximinus Thrax begins to campaign against the revived tribes of the Dacians and Sarmatians.
237 - 238 AD	Persians invade the Roman province of Mesopotamia.
238 AD	Year of the 6 emperors. Death of the Emperor Maximinus Thrax, who was killed when his soldiers mutinied. Death of the Emperor Gordian I, who hanged himself. Death of the Emperor Gordian II, who was killed in battle. Death of the Emperor Pupienus Maximus, who was killed when his bodyguard lynched him. Death of the Emperor Balbinus, who was beaten and dragged naked through the streets of Rome before being killed by the Praetorians.
239 AD	Gordian III sole emperor. Gothic invasion of Lower Moesia is repelled.
240 AD	Birth of the Emperor Diocletian in the province of Dalmatia. A rebellion under the governor of Africa, Sabinianus, is put down near Carthage.
242 AD	Gordian III marches against the Persian invasion of the East, and relieves the city of Antioch from siege.
243 AD	Persian occupation of the province of Syria is defeated by a general named Timesitheus.
244 AD	Death of the Emperor Gordian III, executed by Phillip the Arab who takes the throne. Phillip negotiates peace with the Persian invaders in order to deal with the troubles on the Rhine/Danube border.
245 AD	Phillip campaigns against and makes peace with several Germanic tribes. The future emperor G. Aurelius Valerius Diocletianus is born in Dalmatia.
247 AD	Philippus II is proclaimed emperor by the troops who were loyal to his father.
248 AD	Rome celebrates it's millenium birthday. A rebellion erupts under a Danube commander, Tiberius Claudius Marinus Pacatianus. Gothic tribes take advantage and invade the northern provinces. Decius defeats the invasion of the Goths and resettles Moesia and Pannonia and is proclaimed emperor by his men.
249 AD	Death of the Emperor Phillip the Arab, who was killed in a battle near Verona against Decius Trajanus. The Goths, under a King Kniva, renew their incursions into the Roman Empire.
250 AD	Decius defeats Kniva. Birth of the Emperor Constantius Chlorus, who was born in Danubian region. Approximate birth of the Emperor Carinus. Approximate birth of the Emperor Galerius, near the town of Florentiana in Upper Moesia. Birth of the Emperor Licinius, in the province of Upper Moesia. Approximate birth of the Emperor Maximian, at the city of Sirmium.
251 AD	Herennius claims the throne backed by his army. Pretender to the throne, Julius Valens Licianus, is defeated and executed. Death of the Emperor Decius, who was killed in battle at Abricium against King Kniva of the Carpic Goths. Trebonius Gallus is proclaimed as emperor.
251 AD	Trebonius Gallus is proclaimed as emperor.
253 AD	Death of Trebonius Gallus. Aemilianus is proclaimed as emperor lasting only about 4 months. The general Valerian is proclaimed as emperor.
253 AD	Persian War flares up again, Antioch lost to Persia
254 AD	Marcomani attack and invade the province of Pannonia. The Goths, under King Kniva, rampage, loot and sack the length of Thrace.
256 AD	The Franks, a Germanic tribe fomerly made up of the the Cherusci and Chatti, invade Gaul. The Goths launch an attack on Asia Minor.
257 AD	More Persian invasions.
259 AD	A Germanic tribe, the Juthungi (Jutes), cross the Upper Danube and enter Italy.
260 AD	Jutes defeated by western co-emperor Gallienus. Emperor Valerian is taken captive by the Persian King Shapur I. Gallienu sole emperor.
261 - 274 AD	Gallic Empire established in Gaul by Postumus (261-268) and Tetricus (270-274)
262 AD	Plague throughout the empire.
267 AD	Nomadic tribe known as the Heruli invade Greece.
268 AD	Another Goth invasion eventually defeated by Gallienus at Naissus.
268 AD	Murderof the Emperor Gallienus. Claudius II Gothicus as emperor. Battle of Lake Benacus... Emperor Claudius II Gothicus defeated pretender M. Acilius Aureolus
268 AD	Battle of Mediolanum, in which Emperor Claudius II Gothicus defeated a force of the Germanic Alemanni.
269 AD	The new queen of Palmyra, Zenobia, revolts against Rome and attacks Roman territory.
269 AD	Gothic invaders beaten by Claudius Gothicus again at Naissus.
270 AD	Birth of the Emperor Maximinus II Daia. The Romans abandon the province of Dacia. The army of Zenobia invades Egypt and enters the city of Alexandria. Death of the Emperor Claudius II Gothicus, who died of the plague. Succeeded by Aurelian.
271 AD	Emperor Aurelian defeats the Gothic Chieftain Cannabas. Battle of Placentia, in which a combined Germanic invasion of the Alemanni, Marcomanni, and Juthungi defeat a Roman army under the command of the Emperor Aurelian.
271 AD	More revolts: Septimus in Dalmatia, Domitianus in southern Gaul and Urbanus. Battle of Immae, Aurelian defeats Zenobia of Palmyra.
272 AD	Aurelian campaigns along the Rhine river against the Carpi.
274 AD	Emperor Aurelian drives into Gaul and defeats the breakaway Gallic empire, re-annexing it. Aurelian defeats the Franks, Jutes and the Batavians.
274 AD	Birth of the future Christian emperor Flavius Valerius Aurelius Constantius (Constantine the Great) in the city of Naissus in Upper Moesia.
275 AD	Death of the Emperor Aurelian, who was stabbed to death by a Praetorian named Mucapor. Replaced by 75 year old Cornelius Tacitus.
276 AD	Death of Tacitus, replaced by Florian who is murdered. Ascension of Probus.
277 AD	Emperor Probus begins to campaign in Gaul, clearing the Goths and Germanic tribes from the province.
278 AD	Probus campaigns against Germanic incursion in Raetia and Vandals in Illyricum.
279 AD	Birth of the Emperor Maxentius.
282 AD	Death of the Emperor Probus, who was murdered near Sirmium by his own troops. Carus is proclaimed as ruler in Rome.
282 AD	Carus defeats the Quadi and Sarmatians. Invasion of Persia by the Emperor Carus.
283 AD	Death of Carus. Carinus succeeds as the emperor in the West, and Numerian as the emperor in the East.
284 AD	The leader of the Praetorian Guard, named Diocles, assumes the name Diocletian and the title of emperor in the East after the death of Numerian. The ascension of Diocletion ends the period of the soldier emperors and begins a short time of recovery.
284 AD	Emperor Diocletian introduces the Edict of Maximum Prices, which fixes wages for people and the price of goods.
285 AD	Death of the Emperor Carinus, who was assassinated by his officers during the battle of Margus Valley in Moesia against Diocletian.
286 AD	Maximian defeats the Bagaudae, a group of rebels and discontented peasants, in Gaul. Made co-emperor in the west. Emperor Maximian campaigns along the Rhine River, fighting against the Alemmani and Burgundians.
290 AD	Emperor Diocletian pushes the Saracens out of Syria.
292 AD	Diocletion finished the defeat of the Saracens.
293 AD	Diocletion creates the Tetrarchy (rule of 4) with himself as senior Augustus, Maximian as junior. Galerius is senior Caesar and Constantius Chlorus is junior Caesar .
296 AD	Revolt of Alectus and Carausius in Britain. Defeated by Constantius Chlorus.
296 AD	Emperor Diocletian splits the provinces up in order to lessen the risk from provincial governors. The new provinces are called Dioceses and there are six in the East (Orient, Pontus, Asia, Thrace, Moesia, and Pannonia), and six in the West (Britain, Gaul, Vienne, Italy, Spain, and Africa).
297 AD	Diocletian publishes an edict proscribing a religious order known as the Manichaeans.
297 AD	Galerius takes the Persian royal family hostage, and is therefore able to negotiate for very favorable terms of surrender.
298 AD	Constantius Chlorus repels the incursions of the Alemmani. Diocletian lays siege to Alexandria against a revolt led by Domitius Domitianus and Achilleus. Maximian recaptures the lost portions of Africa and subdues the Moors. Galerius reconquers the province of Mesopotamia.

Roman Timeline of Events - Table of Contents

Did you know...
Gothic power came to an abrupt and dramatic end in the 270s AD, when Emperor Aurelian caught up with a raiding army and destroyed them and killing the Gothic king, Cannabaudes. This caused a major shift in the balance of power in Eastern Europe.