Procopius was with Belisarius on the eastern front until the latter was defeated at the Battle of Callinicum in 531 and recalled to Constantinople. Procopius witnessed the Nika riots of January, 532, which Belisarius and his fellow general Mundus repressed with a massacre in the Hippodrome. In 533, he accompanied Belisarius on his victorious expedition against the Vandal kingdom in North Africa, took part in the capture of Carthage, and remained in Africa with Belisarius's successor Solomon the Eunuch when Belisarius returned east to the capital. Procopius recorded a few of the extreme weather events of 535–536, although these were presented as a backdrop to Byzantine military activities, such as a mutiny in and around Carthage. He rejoined Belisarius for his campaign against the Ostrogothic kingdom in Italy and experienced the Gothic siege of Rome that lasted a year and nine days, ending in mid-March 538. He witnessed Belisarius's entry into the Gothic capital, Ravenna, in 540. Both the "Wars" and the "Secret History" suggest that his relationship with Belisarius cooled thereafter. When Belisarius was sent back to Italy in 544 to cope with a renewal of the war with the Goths, now led by the able king Totila, Procopius appears to have no longer been on Belisarius's staff.