Baltic Sea, had engaged to supply the usurper Procopius with troops for the struggle against 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. Valens, marching north after defeating Procopius, surrounded them with a superior force and forced them to surrender. In the spring of 367, Valens crossed the Danube and attacked the Visigoths under Athanaric. The Goths fled into the Carpathian Mountains, and the campaign ended with no decisive conclusion. The following spring, a Danube flood prevented Valens from crossing; instead he had his troops construct fortifications. In 369, Valens crossed again, from Noviodunum, and by devastating the country forced Athanaric to attack him. Valens was victorious, and Athanaric received Ermanaric's permission to conclude a truce. Athanaric pleaded for treaty terms and Valens gladly obliged. The treaty seems to have largely cut off relations between Goths and Romans, confining trade and the exchange of troops for tribute. Gothic War (376–382) (Greuthungi and Thervingi against the Eastern Roman Empire) Between about 376 and 382 the Gothic War against the Eastern Roman Empire, and in particular the Battle of Adrianople, is commonly seen as important in the history of the Roman Empire, the first of a series of events over the next century that would see the collapse of the Western Roman Empire, although its ultimate importance to the Empire's eventual fall is still debated. Gothic War (401–403) (Visigoths against the Western Roman Empire) In 401 Alaric invaded Italy, but he was defeated by Stilicho at Pollentia (modern Pollenza) on April6, 402. 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. Later, Alaric led the Sack of Rome (410). Gothic War (458) (Visigoths under Theodoric II against the Western Roman Empire under Majorian) 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. Under the new treaty with the Romans, the Visigoths had to relinquish their recent conquests in Hispania and return to federate status. Gothic War (461–476) (Visigoths under Theodoric II, then Euric, against the Western Roman Empire) Gothic War (535–554)