"Magnus Maximus (Latin: Flavius Magnus Maximus Augustus[a], Welsh: Macsen Wledig[b]) (c. 335–28 August 388) was Roman Emperor in the western portion of the Empire from 383 to ...
388.
In 383, as commander of Britain, he usurped the throne against emperor Gratian, and by negotiation with emperor Theodosius I, he was made emperor in Britannia and Gaul the next year while Gratian´s brother Valentinian II retained Italy, Pannonia, Hispania, and Africa. In 387, Maximus´s ambitions led him to invade Italy, resulting in his defeat by Theodosius I at the Battle of the Save in 388. In the view of some historians, his death marked the end of direct imperial presence in Northern Gaul and Britain.Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page)." - (en.wikipedia.org 31.01.2020)
