Year 411 (CDXI) was a common year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Theodosius without colleague (or, less frequently, year 1164 Ab urbe condita). The denomination 411 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
>Emperor Honorius sends two Roman generals to deal with the usurper Constantine III in Gaul. They kill Gerontius, Constantine's rebellious general (magister militum) in Spain, then besiege Arles and defeat Constantine. He is taken prisoner and put to death at Ravenna.
>Following the defeat of the Constantine III, the Burgundians and the Gallic nobility proclaim Jovinus, Gallo-Roman senator, emperor of the Western Roman Empire at Mogontiacum (modern Mainz).
>King Ataulf leads the Goths into Gaul at the instigation of Honorius, who promises to recognise a Visigothic Kingdom if he defeats the several usurpers who threaten the Roman Empire.
>The Alans establish their rule in the Roman province of Lusitania (Portugal south of the Duero River and Spain).
>The Teutonic tribes in Spain join the Roman Empire as foederati (allies with military commitments).
The Battle of Bibracte was fought between the Helvetii and six Roman legions, under the command of Gaius Julius Caesar. It was the second major battle of the Gallic Wars.
>The battle lasted many hours into the night until the Romans finally took the Helvetic baggage train, capturing both a daughter and son of Orgetorix. According to Caesar, 130,000 enemy personnel escaped into the night. Unable to pursue on account of battle wounds and the time it took to bury the dead, Caesar rested three days before he followed the fleeing Helvetii. These, in turn, had managed to reach the territory of the Lingones within four days of the battle. Caesar warned the Lingones to not assist them, prompting the Helvetii and their allies to finally surrender.
This is how Caesar treated migrating foreign tribes.
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