Decius was forced to withdraw his army north to Oescus leaving Cniva ample time to ravage Moesia and move on to Philippopolis (Thracia) (now Plovdiv in Bulgaria).
[5] King Cniva subsequently allied himself with the town commander and governor of Thrace, Titus Julius Priscus, to take on the Roman Emperor Decius.
The Goths' seaborne allies, the Heruli, supplied a fleet carrying huge armies along the coast of the Black Sea where they ravaged coastal territories in Thrace and Macedonia.
In 268, Emperor Gallienus won some important initial victories at land and sea, but it was his successor Claudius II who finally defeated the invaders at the Battle of Naissus in 269.
[6] The Gothic king Ermanaric of a large powerful kingdom north of the Danube from the Black Sea,[7] had engaged to supply the usurper Procopius with troops for the struggle against Roman Emperor Valens.
The Gothic army, reportedly numbering 30,000 men, arrived too late to help Procopius, but nevertheless invaded Thrace and began plundering the farms and vineyards of the province.
The treaty seems to have largely cut off relations between Goths and Romans, confining trade and the exchange of troops for tribute.
A second invasion that same year also ended in defeat at the Battle of Verona, though Alaric forced the Roman Senate to pay a large subsidy to the Visigoths, and devastated Greece.
In late 458 Majorian entered Septimania (now southern France) to attack Theodoric and reclaim the province for the empire.
Majorian defeated Theodoric at the Battle of Arelate, forcing him to abandon Septimania and withdraw west to Aquitania.
[citation needed] The Gothic War, between the Byzantine Empire (Eastern Roman) during the reign of Emperor Justinian I and the Ostrogothic Kingdom of Italy took place from 535 until 554 in the Italian peninsula, Dalmatia, Sardinia, Sicily and Corsica.