The Siege and naval Battle of Massilia was an episode of Caesar's civil war, fought in 49 BC. Lucius Domitius Ahenobarbus had become proconsul of Gaul and was sent to gain control of Massilia (modern Marseille) in order to oppose Caesar. As Caesar marched to Hispania (en route to the Battle of Ilerda), the Massiliots closed their gates to him, having allied with Ahenobarbus and the Optimates. Roused by their hostile actions, he commenced a siege against Massilia, leaving the newly raised XVII, XVIII, and XIX legions to conduct the siege. These were the same legions that would be wiped out at Teutoburg Forest 58 years later. He also placed Decimus Junius Brutus Albinus in charge of his fleet there.