In 383 the army of Britain , led by Magnus Maximus , revolted against Gratian and assassinated him at Lyons ; and when emperor Valentinian II was driven out of Italy , Ausonius retired to his estates near Burdigala ( now Bordeaux ) in Gaul .
After the murder of Gratian in 383 , Ausonius retired to his estates near Burdigala ( now Bordeaux ) in Gaul .