Roman Legions were defeated in 378 c.e. by who?
After the fall of the Western Roman Empire, Constantine I founded the Byzantine Empire, or the Eastern Roman Empire, on the shores on the Bosporus, in the city of Byzantium, which He renamed Constantinople after himself, in the year of 327 AD .
The largest Roman army to ever take the battle field was in 216 BC at the battle of Cannae against Hannibal. The Roman army numbered 85,000 to 110,000 depending on the different sources. Hannibal's army numbered around 35,000 to 45,000. And guess what the Romans lost, hell they didn't just loss they got annihilated. They lost 85% of the army that day. According to some accounts the Roman's dead numbered around 50,000 to 70,000 and another 10,000 to 15,000 captured. The battle on Cannae introduced a new concept in warfare, the Battle of Annihilation. If one takes that the mid range of the number of Roman's dead of 60,000, Cannae was the single bloodiest one day battle in Human history even to this day. Only the dropping of the atomic bombs on Japan surpass it.
Publius Ovidius Naso known as the Roman poet, Ovid, was born in the Roman Republic in 43 BCE. Around 8 CE, he was banished by the emperor to Tomis in the Greek Colony, now Constanta in Romania, on the Black Sea, where he remained until his death in 18 CE.
It was the Classical Antiquity period that was from the 8th-7th century BCE to the 5th century CE.
The Empire was divided by Diocletian in 285 CE. However, the empire was also reunified on many occasions such as during the reigns of Theodosius I, Constantine the Great, and Julian the Apostate. These reunification were all short-lived and died with the death of their respective emperors.
The Visigoths defeated the Romans in the Battle of Adrianople in the year 378 CE. This battle is significant because it marked the first time a Germanic army defeated a Roman army decisively in open combat, leading to major territorial concessions and political changes in the Roman Empire.
Adrianople 378 CE.
The Romans pulled out of Britain in the 5th century CE. During this time other barbarian tribes were attacking different parts of the Roman empire and Emperor Honorius decided that the Roman legions were needed elsewhere.
Charles Martel defeated Muslim raiders from Spain at the Battle of Tours.
Along the Danube River in 69 AD, barbarians were defeated by the Third Gallica Legion.
The Romano-Britons expelled Roman magistrates in 409 CE. The Roman legions were first withdrawn from Britannia to defend Gaul in 402. This is also the date of the last archaeological finds of large quantities of Roman coinage. This means that most of the troops were withdrawn or that the empire could not afford to pay any remaining troops. The size of any remaining troops must have been small. In 407 a usurper rallied the leftover troops and took them to Gaul where he joined them with some legions in Gaul and he proclaimed himself emperor. By this date there were no new Roman coins.
Common Era
The Western Roman Empire fell to the Goths, Vandals and Huns who poured in from the east over a century - the Roman legions legions simply couldn't match them in numbers and the long frontier which they had to defend. Having allowed the Goths to settle inside the Danube line, hoping to use them to keep out the others, they had the enemy within the gates and by the late 5th Century CE the Western Empire had been taken over.The Eastern Empire continued on, centred in Constaninople (now istanbul). Over the centures the territory was progressively eroded by intrusions from Asian invaders including the Seljuk Turks, and was even captured by a Crusade more interested in pillage than Christianity. With this weakened state the Ottoman Turks moved in and the territory shrank to just the environs of the capital. Isolated, it was finally beseiged and captured in 1453 CE by the Ottoman Turks under Mehmed II.
Roman Republic 4xx to 28 BCE. Roman Empire 28 BCE to 476 CE, however the Byzantine Empire in the east continued until 1453 CE.
509 CE
Tiberius ruled the Roman empire from 14 AD/CE to 37 AD/CE
Rome was sacked, overthrown, defeated, crushed, beaten, overwhelmed by the Visigoths in 410 CE. The Romans, who had conquered "the world" were now being overrun and conquered themselves. Invaders pillaged and stole , and then went back to their homelands after "sending a message" to Rome. In 476 CE, the Roman empire just totally falls apart.