After the strengthening of the bond between Octavian and Mark Antony with the Pact of Brundisium, the two triumvirs had to manage the menace of Sextus Pompey, son of Pompey. Sextus had occupied the province of Sicily, which provided much of Rome's grain supply. When Sextus had managed to bring Rome to famine, in 39 BC, Octavian and Antony sought an alliance with him, appointing him governor of Sicily, Sardinia, and the Peloponnese for five years (Treaty of Misenum). The alliance was short-lived, and Sextus cut the grain supply to Rome. Octavian tried to invade Sicily in 38 BC, but his ships were forced to go back because of bad weather.