The reigns of Tiberius, Caligula, and Claudius were mainly peaceful in Egypt, with intermittent civil strife between Greeks and Jews in Alexandria. According to the Latin historian Tacitus, Germanicus visited Egypt without the permission of Tiberius and caused a rift with his uncle, the emperor. Claudius refused Alexandrian demands for self-government under their own senate, and attempted to quell the unrest between Alexandrian Greek and Jews. Under Nero, perhaps influenced by Chaeremon of Alexandria – an Egyptian priest and the emperor's Stoic tutor – an expedition to Meroë was undertaken, though possible plans for an invasion of the southern kingdom was forestalled by the military demands of the First Jewish–Roman War, a revolt in Judaea.