The Augustus' Eighth Legion was one of the oldest legions of the Imperial Roman army founded by Pompey in 65 BC, and continuing in service to Rome for at least 400 years thereafter. It was ordered to Cisalpine Gaul around 58 BC by Julius Caesar, and marched with him throughout the entire Gallic Wars.
The legion participated in the Roman conquest of Britain in 43. Future emperor Vespasian was the legion's commander at the time, and led the campaign against the Durotriges and Dumnonii tribes. Although it was recorded as suffering a defeat at the hands of the Silures in 52, the II Augusta proved to be one of the best legions, even after its disgrace during the uprising of queen Boudica.