For the next 600 years, Sicily was a province of the Roman Republic and later Empire. It was something of a rural backwater, important chiefly for its grain fields, which were a mainstay of the food supply for the city of Rome until the annexation of Egypt after the Battle of Actium largely did away with that role. The empire made little effort to Romanize the region, which remained largely Greek. One notable event of this period was the notorious misgovernment of Verres, as recorded by Cicero in 70 BC in his oration, In Verrem. Another was the Sicilian revolt under Sextus Pompeius, which liberated the island from Roman rule for a brief period.