The Germanic Conquest of Rome
China waged centuries of war with powerful and intractable barbarians, particularly the Xiongnu. In 100 AD, this finally paid off as the last of the tribes fled into Central Asia. These powerful tribes crashed into tribes further west and seized their territory. The losers fled yet further west. The flood of barbarians crashing into Europe was the end of this chain reaction. Europe would experience centuries of barbarian invasions sometimes relatively mild, but other times devastating. The first of the truly horrific invasions began when the Xiongnu themselves smashed into Europe in 372 AD. Europeans, however, would give them a new name, the Huns.
It is hard to express the deep impact the Huns had on the Roman Empire. The Germans that Tiberius had left on the other side of the Danube had now lived across the river and fought with the Romans for centuries. They had settled, ruled kingdoms, made Roman alliances as part of the ever shifting network of Roman – Germanic politics. While still barbarians to the Roman sensibility, the Germans were everyday absorbing more and more Roman culture and participating in a racially charged, yet fundamentally healthy relationship. In contrast, the Huns fell upon Europe like demons out of legend. A short Central Asian people, living on horseback, wearing little to no clothes much less armor, they wiped out cities and killed without regard for soldiers vs. civilians, men vs. women. Their cavalry was the most feared army of its day, and the only structure to their culture was the annual raiding season around which the life of the Huns revolved.
With the rise of the war leader Attila, they raided throughout the lands of the Roman Empire and were poised at one point to wipe out Rome itself. However, Attila inexplicably turned back and never besieged Rome after receiving an embassy from the Pope, one of the most mysterious turning points in Western civilization. The Hun menace would gradually fade, but they slaughtered and raped throughout Eastern and Western Europe with a feral ferocity unknown in Europe for centuries. They were sometimes thrown back by powerful alliances of Roman and German forces, and sometimes completely unchallenged as they sowed death and destruction.
In hindsight, the most important legacy of the Huns turned out to be their first. Rome first heard of these dreaded warriors when news reached them that a new group of barbarians had conquered the powerful Ostrogothic kingdom. The Ostrogoths fled west and in turn conquered the less powerful Visigoths. The Visigothic kingdom thus became a massive band of starving refugees in 376 AD. They desperately petitioned the Roman emperor, Valens, for succor and a place to settle inside the Roman Empire. In exchange they offered to serve the emperor and render military service. This was the largest group of Germans in Roman history to make such a request, but because much of Rome's military strength was derived from similar relationships with Germanic settlers, Valens granted their request.
Unfortunately, when the emperor left for the East to throw back other invasions, the local general betrayed the Emperor's agreements. He stole the Visigoths supplies to sell for his own profit and left the Visigoths to literally starve to death. Predictably, they rioted, slaughtering any Romans they found as vengeance and laid waste to the local region by foraging enough food to survive the winter. In 378 AD, Valens himself returned to put down the Visigoths. At the Battle of Adrianople, Valens fell. His death in battle saved him from seeing his army wiped out. Rome had many times survived the death emperors, survived threats to its borders, even regained Roman territories that had been stripped away. But Adrianople effectively broke the Roman Empire – it was Rome's last major battle.
The Visigoths were eventually appeased into signing a profitable peace treaty by Theodosius I in 382 AD; primarily because they could not be defeated. However, the Visigoths never trusted the Romans and their success against the Romans in battle had not given the Visigoths any respect for Rome; Roman / German relations were generally rocky, however, this was unusual. It was the first time Rome had made peace with a tribe that actively distrusted and hated it; Rome's German allies sensed (correctly) that the new treaty demonstrated Rome's weakness, not her strength or wisdom.
Theodosius I, by various political circumstances became the Emperor of both East and West. He was the last emperor to rule over an undivided Empire, an event long after held to be the last bright spot in Roman history. Sadly, it had nothing to do with his ability to rebuild the Empire, though his peace treaty with the Visigoths was the last calm the Romans would ever enjoy in the West. It was Theodosius I's statement that defending the empire was no longer of primary importance. On the contrary, Theodosius I was too busy earning the name by which Catholics remember his to this day, Theodosius the Great. Rather than put down rebellions, he had Christians to kill, as long as they were the right (or more specifically the wrong) kind of Christians. Theodosius I earned the love of the Church and his subjects by declaring Nicene Christianity the official state religion in 380 AD. The move authorized the Nicenes to violently suppress Arian Christians and other sects. If the unraveling of the Roman Empire was not important to him, here at least was an idea he could get behind. In the future Christians would be on both side of religious persecutions as sects vied against each other for orthodoxy and power.
Theodosius died in 395 AD. His two sons inherited the empire; Aracadius, the senior emperor in the East, literally did nothing with his reign even as Western Europe collapsed. In the West, Honorius ruled little better. He was dependent on his Germanic general (and father-in-law), Stilicho, who had too few troops and too many unruly tribes to contain. Despite successfully throwing back a barbarian invasion in 406 AD, the Vandals and Alans responded by abandoning their post. Assigned to protect Gaul, they decided that Rome was not the Rome of yesteryear; they violated their treaties and decided to seize Spain instead. When they had acquired all the plunder they desired, they settled down erecting their own independent kingdoms. Effectively, 406 AD is the year that the Germanic tribes began carving up the Roman empire.
Stilicho was not idle, however; he was fighting court intrigue and trying to gather a force to put down the rebellion. Like Theodosius I, however, the court considered ruling Rome to be secondary to stamping out the Arian heresy. In 408 AD, they convinced Honorius that Stilicho's support for Arianism marked him as a traitor, and he was executed. It is difficult to imagine how deeply the court believed in their internal religious war. They were not stupid, they knew exactly what Stilicho's death meant; they simply cared about murdering Arians (especially court favorites) even more. With Stilicho's execution, preparations for the campaign to Spain were scrapped almost immediately; everyone knew there were no competent generals to lead it. Thus Spain was lost to the empire for good. It was not lonely for long.
When the Visigoths learned that Stilicho was dead, they decided to take up their grudge against the Romans in open warfare once again. Led by their king, Alaric, they marched on Rome forcing Honorius to seal himself and his army inside the city; despite the intense hatred of Stilicho there was a simultaneous understanding that they had no way of facing the Visigoths in battle without him. The Visigoths accepted a massive ransom to leave the city alone in early 409 AD. However Alaric, like most of his people, hated and despised Rome. In his heart, Alaric and the Visigoths wanted war; they didn't want Rome's money, they wanted to take revenge upon the Romans. So only a few months later, he returned to Rome. Rome knew the threat posed by Alaric, and at first tried to outlast him by accepting Alaric's terms again. This time, however, the Visigoths were not in the mood to keep the peace. It took several uneasy months of "cooperation", but they finally found a way to push the Romans too far, and the truce collapsed.
Thus in 410 AD, the Visigoths laid siege to Rome, a city once considered impregnable because of its walls. Given its history, the siege was over quite quickly. Alaric conquered Rome and plundered it, though the mythical importance of the city was clearly not lost on the Visigoths. There was no mass slaughter, there was no brutal rape. The Visigoths claimed their title as conqueror, and stripped the city of everything they desired, but that was all. Their sack was respectful for the period. Yet, it was the first time Rome had fallen to a conqueror since its sack by the Gauls in 390 BC; its conquest shook the Roman world. Or at least, everyone except the Emperor Arcadius in the East.
The Germanic tribes were responsible for the defense of large sections of the empire. What the Alans and the Vandals had started in 406 AD now became a free for all. The Germans decided that the Roman Empire was theirs to do with as they pleased, and they carved up Western Europe among themselves. Each tribe surged across the continent trying to seize the best territories they could hold. The succeeding Roman emperors did what they could, but order could not be reestablished and chaos reigned as the various armies would raise states in the morning only to see them conquered in the night. A patchwork of states finally started to stabilize around 507 AD. Only the greatest of the states survived, the mightiest of the warriors. And the Roman Empire was not among them.
A Germanic general, Odoacer, deposed the last Emperor of Rome, the boy emperor, Romulus Augustulus. The boy was so agreeable and well liked that he passed the rest of his life on a Roman villa in the countryside and lived to a ripe old age. But while Constantinople would continue to call itself the Roman Empire for centuries, the Roman Empire in Western Europe formally died with his deposition in 476 AD.