[6] These religious policies created tension with pro-Christian figures, such as Emperor Theodosius and the powerful and influential Bishop Ambrose, who left his see in Milan when the imperial court of Eugenius arrived.

[7] Eugenius was also successful in the military field, notably in the renovation of old alliances with Alamanni and Franks, even marching to the Rhine frontier, where he impressed and pacified the Germanic tribes by parading his army in front of them.

[2] In January 393, Theodosius promoted his eight-year-old son Honorius to the rank of Augustus of the West, indicating he considered Eugenius' elevation illegitimate.

[10][2] Following the news of Honorius' elevation to Augustus, Eugenius and Arbogast marched their army, stripped from the Rhine frontier,[11] into Italy in the spring of 393.

[5] The bloody battle lasted two days, and was marked by unusually strong winds, and ended with a victory for Theodosius' forces.