Valentinian II
Magnus Maximus was elected emperor by his men in 384, in opposition to Gratian, who defeated him in battle in 383. Maximus was briefly recognized as the Western Emperor by Eastern Emperor Theodosius I, however this recognition was revoked by both when Maximus invaded Italy and deposed Valentinian II in 387. Valentinian II fled to the Eastern Roman Empire, and convinced Theodosius to invade the Western Roman Empire and restore him to the Western Roman throne, which he did in 388. Maximus was defeated in battle near Aquileia, and executed.