Nevertheless, the consuls of the year, Aulus Hirtius and Gaius Pansa, marched northward to raise the siege. Guided by Cicero (whose "Philippics" date from this time), the Senate was inclined to view Mark Antony as an enemy. Caesar Octavian, the nineteen-year-old heir of Caesar, and already raised to the rank of propraetor, accompanied Gaius Pansa north. The first confrontation occurred on April 14 at the battle of Forum Gallorum, where Antony hoped to deal with his opponents piecemeal. Antony defeated the forces of Gaius Pansa and Octavian, which resulted in Pansa suffering mortal wounds; however, Antony was then defeated by a surprise attack from Hirtius. A second battle on 21 April at Mutina resulted in a further defeat for Antony and Hirtius' death. Antony withdrew, unwilling to become the subject of a double circumvallation as Vercingetorix had done to Caesar at Alesia.