Note 147
From Chapter 25 of the Decline & Fall

Valens enim, ut consulto placuerat fratri, cujus regebatur arbitrio, arma concussit in Gothos ratione justa permotus. Ammianus (xxvii. 4)

then proceeds to describe, not the country of the Goths, but the peaceful and obedient province of Thrace, which was not affected by the war.