Anastasian War participant Byzantine Empire
The Anastasian War was fought from 502 to 506 between the Byzantine Empire and the Sasanian Empire. It was the first major conflict between the two powers since 440, and would be the prelude to a long series of destructive conflicts between the two empires over the next century.Prelude
Several factors underlay the termination of the longest period of peace the Eastern Roman and the Sassanid Empire ever enjoyed. The Persian king Kavad I needed money to pay his debts to the Hephthalites who had helped him regain his throne in 498/499. The situation was exacerbated by recent changes in the flow of the Tigris in Lower Mesopotamia, sparking famines and flood. When the Roman emperor Anastasius I refused to provide any help, Kavad tried to gain the money by force.Anastasius' campaign of 503 and Kavad's counterattack
The Byzantine emperor Anastasius I dispatched an army in May 503 against the Sasanians. The army numbered 52,000 men, the largest Roman force in the East since Julian's invasion of Persia, and the largest assembled Roman army throughout the 6th century. The force gathered at Edessa and Samosata. It operated in three divisions under magister militum per Orientem Areobindus, strategos Patricius, and Hypatius. Hypatius and Patricius attacked Amida, which was held by a 3,000-strong garrison under Glones. Areobindus, together with Romanus and the Arab phylarch Asouades (Aswad) (probably a Kinda leader) attacked Nisibis, in which Kavad was residing. Procopius also mentions Celer as a fourth commander. Notable officers associated with this force include "hyparch" Apion I (the Egyptian), comes Justin (the future emperor),  Patriciolus and his son Vitalian (who later revolted against Anastasius), the Colchian Pharesmanes, and the Goths Godidisklus and Bessas.Initially, Areobindus gained the upper hand in Nisibis, but Kavad's counterattack defeated him, plundered his fort Apadna, and forced him to retreat westward; Hypatius and Patricius attempted to assist him, but it was too late. They failed to join with Areobindus and were decisively defeated between Apadna and Tell Beshme and retreated to Samosata. According to Zacharias, their cavalry suffered heavily during the retreat, falling from the cliffs of mountains. Kavad continued westward to Constantia but failed to capture it, though he received supplies from its inhabitants. In early September, Kavad reached near Edessa. Areobindus rejected Kavad's demand of 10,000 pounds (4,500 kg) of gold in exchange for peace. Sasanians and Lakhmids overran much of Osrhoene but attempts to attack the fortified city failed. Meanwhile, Byzantine forces under Pharesmanes attacked Amida, who killed the Sasanian commander Glones through cunning. This, together with Hunnic incursions, the arrival of Byzantine reinforcements, and Kavad's lack of supplies, all forced him to withdraw to Persia. This further contributed to the reputation of Edessa as being impregnable. Meanwhile, the dux of Osrhoene, Timostratus, defeated the Lakhmids, and the Tha'labites (Byzantine Arabs) attacked Lakhmid capital al-Hira.