The Battle of Thessalonica was fought in the summer or autumn of 380 by Fritigern's Goths and a Roman army led by

Theodosius I Theodosius I ( grc-gre, Θεοδόσιος ; 11 January 347 – 17 January 395), also called Theodosius the Great, was Roman emperor from 379 to 395. During his reign, he succeeded in a crucial war against the Goths, as well as in two ...

. Reconstituted after

Adrianople Edirne (, ), formerly known as Adrianople or Hadrianopolis ( Greek: Άδριανούπολις), is a city in Turkey, in the northwestern part of the province of Edirne in Eastern Thrace. Situated from the Greek and from the Bulgarian border ...

, the

East Roman army The Eastern Roman army refers to the army of the eastern section of the Roman Empire, from the empire's definitive split in 395 AD to the army's reorganization by themes after the permanent loss of Syria, Palestine and Egypt to the Arabs in the ...

suffered another major defeat. Theodosius retreated to Thessalonica and surrendered control of operations to the Western Emperor,

Gratian Gratian (; la, Gratianus; 18 April 359 – 25 August 383) was emperor of the Western Roman Empire from 367 to 383. The eldest son of Valentinian I, Gratian accompanied his father on several campaigns along the Rhine and Danube frontiers and w ...

References

* Peter Heather, 1996. ''The Goths'', Blackwell Publishers. . 380 Thessalonica 380 Thessalonica 380 Thessalonica 380 Thessalonica 380 Roman Thessalonica 380s in the Byzantine Empire Thessalonica 380 {{AncientRome-battle-stub