What was the subject of procopius's the polemon

procopius,  (born  probably between 490 and 507,  caesarea,palestine  [now in israel]) byzantine historian whose works are an indispensable source for his period and contain much geographical information.

from 527 to 531 he was adviser (consilarius) to the military commander  belisarius  on his first persian campaign. in 533 and 534 he took part in an expedition against the vandals and was in africa until 536, when he joined  belisarius  in sicily. he was in  italy  on the gothic campaign until 540, after which he apparently returned to constantinople, since he describes the great plague of 542 in the capital. nothing is known with certainty of his subsequent life. he may have been  prefect  of constantinople in 562.

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