Valentinian simultaneously leads an army from Gaul…
November 375 CE
Valentinian simultaneously leads an army from Gaul into Quadi lands, devastating the countryside before withdrawing to winter quarters at Brigetio on the Danube.
The Quadi, recognizing the futility of further resistance, dispatch envoys to Valentinian, who, upon hearing the envoys' excuse for their rebellion as the result of Roman aggression, reportedly becomes apoplectic with rage and suffers a fatal stroke on November 17, 375.
Upon his death, the sixteen-year-old Gratian is appointed sole ruler of the West.
Valens agrees to a peace.