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Octavian defeated Marc Antony in the battle of Actium.

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Q: Who defeated Marc Anthony's army to become emperor of the Roman Empire?
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Continue Learning about History of Western Civilization

Did Constantine defeat Diocletian to become Emperor of Rome?

No. Constantine defeated a rival general named Severus to become Emperor of Rome. In fact, Diocletian was the first emperor to abdicate, and he lived out the rest of his life quietly.


Did the halves of the Roman empire attack each other?

The eastern and western parts of the Roman Empire were two parts of a sole Roman Empire and never attacked each other. They did not attack each other because they were part of the same empire. In fact there ware alternations of periods with co-emperors (with one in charge of the east and one in charge of the west) and periods with a sole emperor for the whole of the empire. In 307 Galerius, the senior emperor in the eastern part, attacked Maxentius, a usurper emperor in Italy. However, this was not an attack of the east on the west. It was an attempt to deal with usurpation. Finding himself in a vulnerable position, Galerius did not engage Maxentius, withdrew from Italy and proclaimed Licinius as senior emperor in the west and Constantine as junior emperor in the west. Maxentius was eventually defeated by Constantine, who, after winning a civil war against Licinius (who had become senior emperor of the eastern part of the empire after the defeat of Maxentius) became the sole emperor of the whole Roman Empire. Theodosius I attacked Magnus Maximus a usurper emperor who took over the provinces of the western part of the Roman Empire except for Italy. Theodosius won. After this the emperor of the western part of the empire, Valentinian II, was found hanging in his room and there was another usurper emperor, Eugenius. Theodosius defeated him and became the sole emperor of the whole of the Roman Empire.


What obstacle did Constantine have to overcome before he became sole emperor?

Constanine had to overcome a system we call the tetrarchy, where the roman empire was ruled by 4 emperors, Constantine was one of these and he successfully defeated his colleagues to become the sole emperor.


When did the Roman republic become the Roman empire?

Generally speaking there are two answers to this question. In all sense of the term of empire, it can be said that the Roman republic became an empire when the last remnants of its rival, Carthage was laid to waste. Rome then ruled the western areas of the Mediterranean Sea. In another sense, the Roman republic came to an end upon the rule of Augustus Caesar. At that point in 31 BC BCE, Octavian became Augustus Caesar and the "empire" ruled by an emperor can be said to be the end of the republic and into an empire.


How long did Constantine rule Rome?

There was no such thing as a United Roman Empire, no such title ever occurred. There was always just one title: Roman Empire. This empire was never divided. There had been alternations of periods of co-emperorship and periods with a sole emperor. In the early days of co-emperorship, this involved an emperor in charge of the east or west and his son in charge of the other part as a co-emperor. Later there were times when the co-emperors were brothers. Not long before Constantine's bid for power, the emperor Diocletian created the tetrarchy (rule by four) where the empire was ruled by two senior emperors (Augusti, plural, Augustus, singular) and two junior emperors (Caesar(s)). Each of these men was in charge of one the four administrative units of the empire which Diocletian had created: the praetorian prefectures. These were subunits of a sole empire. Constantine was the sole emperor of the Roman Empire for thirteen years, from 324 to his death in 337. In 306 Constantine became the Caesar of the praetorian prefecture of Galliae (Britain, Gaul and Hispania). In 309 he declared himself Augustus of the west, but was not actually in charge of the whole of the west because Maxentius, a usurper, was in charge of the praetorian prefecture of Italia et Africa. In 312 Constantine defeated Maxentius in a civil war and became effectively the Augustus of the west until 324. In 324 he won a civil war against his co-emperor, Licinius, the Augustus of the east, and become sole emperor.

Related questions

What did Octivian become?

The Roman Senate made Octavian the emperor a emperor after he defeated the Egyptian Navy.


When did Augustus become the emperor of the roman empire?

Augustus Caesar became emperor of the Roman Empire in 27 B.C.


Did augustus become the first emperor?

Yes. He was the first emperor of the Roman Empire


What Emperor in the west did Constantine defeat to become the only Emperor of Rome?

Constantine defeated Maxentius, an usurper emperor in Rome, who took charge of Italy. However, this did not make him the sole emperor. He became co-emperor with Licinius, the emperor of the west. Therefore, it was when he defeated the emperor of the east (Licinius) in his second civil war that Constantine became the sole emperor.


Did Constantine defeat Diocletian to become Emperor of Rome?

No. Constantine defeated a rival general named Severus to become Emperor of Rome. In fact, Diocletian was the first emperor to abdicate, and he lived out the rest of his life quietly.


Did the halves of the Roman empire attack each other?

The eastern and western parts of the Roman Empire were two parts of a sole Roman Empire and never attacked each other. They did not attack each other because they were part of the same empire. In fact there ware alternations of periods with co-emperors (with one in charge of the east and one in charge of the west) and periods with a sole emperor for the whole of the empire. In 307 Galerius, the senior emperor in the eastern part, attacked Maxentius, a usurper emperor in Italy. However, this was not an attack of the east on the west. It was an attempt to deal with usurpation. Finding himself in a vulnerable position, Galerius did not engage Maxentius, withdrew from Italy and proclaimed Licinius as senior emperor in the west and Constantine as junior emperor in the west. Maxentius was eventually defeated by Constantine, who, after winning a civil war against Licinius (who had become senior emperor of the eastern part of the empire after the defeat of Maxentius) became the sole emperor of the whole Roman Empire. Theodosius I attacked Magnus Maximus a usurper emperor who took over the provinces of the western part of the Roman Empire except for Italy. Theodosius won. After this the emperor of the western part of the empire, Valentinian II, was found hanging in his room and there was another usurper emperor, Eugenius. Theodosius defeated him and became the sole emperor of the whole of the Roman Empire.


When did Justinian become emperor of the byzantine empire?

August 9, 527 A.D.


What did Christianity become to the Roman Empire?

After the Emperor Constantine converted to Christianity, that became the official religion of the Roman Empire.


What was the role of the emperor in the Aztec empire?

In the Aztec empire, the emperor is worshiped as a living god and enjoys unquestioned authority. Although they weren't always able to in the past, women can now become empresses.


How did christianity become the religion of the roman empire?

Christianity was forced upon the people of the Roman empire by the emperor Theodosius I in 380 AD.


What king defeated the Persians to become ruler of Judah?

No Greek king conquered Persia as there was no kingdom of Greece, and no king. King Alexander of Macedonia defeated the Persian Empire and made it into an empire of his own. Judah was a small state within that empire.


Who did Caesar defeat to take control of Rome?

To become sole ruler of the Roman empire, Caesar had to win the civil war which he started. First he overtook and defeated Pompey. He then had to defeat Cato.To become sole ruler of the Roman empire, Caesar had to win the civil war which he started. First he overtook and defeated Pompey. He then had to defeat Cato.To become sole ruler of the Roman empire, Caesar had to win the civil war which he started. First he overtook and defeated Pompey. He then had to defeat Cato.To become sole ruler of the Roman empire, Caesar had to win the civil war which he started. First he overtook and defeated Pompey. He then had to defeat Cato.To become sole ruler of the Roman empire, Caesar had to win the civil war which he started. First he overtook and defeated Pompey. He then had to defeat Cato.To become sole ruler of the Roman empire, Caesar had to win the civil war which he started. First he overtook and defeated Pompey. He then had to defeat Cato.To become sole ruler of the Roman empire, Caesar had to win the civil war which he started. First he overtook and defeated Pompey. He then had to defeat Cato.To become sole ruler of the Roman empire, Caesar had to win the civil war which he started. First he overtook and defeated Pompey. He then had to defeat Cato.To become sole ruler of the Roman empire, Caesar had to win the civil war which he started. First he overtook and defeated Pompey. He then had to defeat Cato.