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The Battle of Mindouos was fought between the Persians and Byzantines just after the battle of Thannuris (528). Procopius wrongly claimed that the two battles were one. The Byzantine commander Belisarius was ordered to build a fortress at the location. When Persian forces arrived in the area, his forces were routed in a battle on a nearby hill. As Belisarius was promoted shortly afterwards, it is likely that he was not seen as being responsible himself for the defeat. It is possible but unlikely that Belisarius was not the overall commander of the Byzantine army, but a junior partner.
References
Lee, A. D. (15 January 2013). From Rome to Byzantium AD 363 to 565. Edinburgh University Press. p. 257. ISBN978-0-7486-6835-9.