Gaius Aelius Gallus was the second prefect of Roman Egypt (Aegyptus), from 26 to 24 BC, in the reign of Augustus. His expedition to Arabia Felix, of which an account is given by Strabo,[3] as well as by Cassius Dio[4] and Pliny the Elder[5][6] turned out to be a complete failure. In this expedition, Strabo mentioned Ilasaros as the controller of Hadhramaut at that time.