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The Battle of the Frigidus, also called the Battle of the Frigid River, was fought between September 5-6 394, between the army of the Eastern Emperor Theodosius I and the army of Western Roman ruler Eugenius. The defeat of Eugenius and his commander, the Frank magister militum Arbogast, put the whole empire back in the hands of a single emperor for the last time in Roman history. Most significantly, the battle was the last attempt to contest the Christianization of the empire, its outcome decided the fate of Christianity in the western Empire.
Forebodings
Theodosius prepares Over the following year and a half Theodosius marshalled his forces together for the invasion. The Eastern armies had atrophied since the death of the emperor Valens and most of his men at Adrianople and it fell to the generals Flavius Stilicho and Timasius both to restore discipline to the Eastern legions and to bring them back up to strength through recruitment and conscription. At the same time another of Theodosius's advisers, the eunuch Eutropius, was sent out from Constantinople to seek the advice and wisdom of an aged Christian monk in the Egyptian town of Lycopolis. According to the accounts of the meeting given by Claudian and Sozomen, the old monk prophesied that Theodosius would achieve a costly but decisive victory over Eugenius and Arbogast. The Eastern army set out towards the west from Constantinople in May of 394. The regalvanized legions were bolstered by numerous barbarian auxiliaries including over 20,000 Visigoth federates and additional forces from Spain and Syria. Theodosius himself led the army, and among his commanders were his own generals Stilicho and Timasius, the Visigoth chieftain Alaric, and an Iberian named Bacurius. Their advance through Pannonia of the Julian Alps was unopposed, and Theodosius and his officers must have had suspicions about what lay ahead when they discovered that the eastern ends of the mountain passes were undefended. Arbogast had, based on his experiences fighting against the usurper Magnus Maximus in Gaul, decided that the best strategy was to keep his forces united to defend Italy itself, and to that end he went so far as to leave the Alpine passes unguarded. Arbogast's forces consisted mainly of his fellow Franks and Gallo-Romans, plus his own Gothic auxiliaries. Thanks to Arbogast's strategy of maintaining a single, relatively cohesive force, the Theodosian army passed unhindered through the Alps and descended towards the valley of the Frigidus River above Aquileia. It was in this narrow, mountainous region that they came upon the Western army's encampment in a pass near present-day Vipava, Slovenia, in the first days of September. The battle Theodosius attacked almost immediately, having undertaken little to no prior reconnaissance of the field of battle. He committed his Gothic allies into action first, perhaps hoping to thin their ranks through attrition and lessen their potential threat to the Empire. The Eastern army's headlong attack resulted in heavy casualties but little gain, and the Spanish general Bacurius was among the dead. Day's end saw Eugenius celebrating his troops' successful defense of their position while Arbogast sent out detachments to close off the mountain passes behind Theodosius's forces. After a sleepless night, Theodosius was cheered by the news that the men Arbogast had sent to bottle him up in the valley intended to desert to his side. Buoyed by this favorable development, Theodosius's men attacked once again. This time nature was on their side as a fierce tempest — apparently a regular occurrence in the region — blew along the valley from the east. The high winds blew clouds of dust into the faces of the Western troops. Buffeted by the winds, Arbogast's lines broke and Theodosius gained the decisive victory that the Egyptian monk had prophesied. In the aftermath, Eugenius was captured and brought before the emperor. His pleas for mercy went unanswered and he was beheaded. Arbogast escaped the defeat and fled into the mountains, but after a few days' wandering, he concluded escape was impossible and committed suicide. Aftereffects It had been a costly but total victory for Theodosius, and a total loss for the Pagans. The western provinces quickly submitted to Theodosius, who became the last emperor of a united empire. Most significantly, the battle was the last attempt to contest the Christianization of the empire, its outcome decided the fate of Christianity in the western Empire. The battle is on par with that of the Battle of the Milvian Bridge in importance, for it was seen not only as a victory in a civil war, but a vindication of the Christian God and the triumph of Christianity - within a generation the elite Pagan families of Rome would give up any serious resistance to Christianity and re-invent themselves as the papal families of Late Antiquity. Unfortunately, the battle also accelerated the collapse of the Roman army in the west. The legions were already losing their effectiveness due to reorganizations and a decline in the quality of their training and discipline, and the losses at the Battle of the Frigidus weakened the western legions — whose task in defending the empire from the barbarian invaders was much harder than the eastern ones — still further. This downturn in the capabilities of the Roman soldiers meant an increasing reliance by the Western Empire on barbarian mercenaries employed as federates, who often proved too unreliable, or worse. Notes | |||||||||||||||||||||||||||||||
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