In 382 a treaty was made which restored peace to the Eastern Empire, the Visigoths nominally owning the sovereignty of Rome, but living in virtual independence. They continued to increase in numbers and in power, and in A.D. 395, under Alaric, their King, they invaded Greece, but were compelled by Stilicho, in 397, to retire into Epirus. Stilicho was the commander-in-chief of the Roman army, and the guardian of the young emperor Honorius. Alaric soon afterward became commander-in-chief of the Roman forces in Eastern Illyricum and held that office for four years. During that time he remained quiet, arming and drilling his followers, and waiting for the opportunity to make a bold stroke for a wider and more secure dominion.
In the autumn of A.D. 400, while Stilicho was campaigning in Gaul, Alaric made his first invasion of Italy, and for more than a year he ranged at will over the northern part of the peninsula. Rome was made ready for defence, and Honorius, the weak Emperor of the Western Empire, prepared for flight into Gaul; but on March 19th of the year 402, Stilicho surprised the camp of Alaric, near Pollentia, while most of his followers were at worship, and after a desperate battle they were beaten. Alaric made a safe retreat, and soon afterward crossed the Po, intending to march against Rome, but desertions from his ranks caused him to abandon that purpose. In 403 he was overtaken and again defeated by Stilicho at Verona, Alaric himself barely escaping capture. Stilicho, however, permitted him—some historians say, bribed him—to withdraw to Illyricum, and he was made prefect of Western Illyricum by Honorius. Such is the prelude, followed in history by the amazing exploits of Alaric’s second invasion of Italy.
His troops having revolted at Pavia, Stilicho fled to Ravenna, where the ungrateful Emperor had him put to death August 23, 408. In October of that year Alaric crossed the Alps, advancing without resistance until he reached Ravenna; after threatening Ravenna he marched upon Rome and began the preparations that ended in the sack of the city.
The incapacity of a weak and distracted government may often assume the appearance, and produce the effects, of a treasonable correspondence with the public enemy. If Alaric himself had been introduced into the council of Ravenna, he would probably have advised the same measures which were actually pursued by the ministers of Honorius. The King of the Goths would have conspired, perhaps with some reluctance, to destroy the formidable adversary, by whose arms, in Italy as well as in Greece, he had been twice overthrown. Their active and interested hatred laboriously accomplished the disgrace and ruin of the great Stilicho. The valor of Sarus, his fame in arms, and his personal, or hereditary, influence over the confederate Barbarians, could recommend him only to the friends of their country,