fought against Sulla in the first civil war. In 82 BC, he withdrew to Hispania as a governor representing his political faction, the populares. The Roman officials in Hispania did not recognise his authority, but he took control with his army. Sertorius sent an army, under Livius Salinator, to fortify the pass through the Pyrenees against Sulla's forces. However, Salinator was killed by treachery and these forces, under the command of Gaius Annius, broke through. Sertorius fled to Africa where he undertook a campaign in Mauretania in which he defeated one of Sulla's commanders and captured Tingis (Tangier). Disaffected Lusitanians sent envoys to Sertorius and chose him as their leader because of his benign policy when he was governor. The Lusitanians probably wanted someone who was sympathetic to them. In 80 BC, Sertorius defeated a naval force under Aurelius Cotta and landed in Hispania. He went to Lusitania, organised their tribes, returned Hispania Ulterior and won the Battle of the Baetis River. Rome sent Quintus Caecilius Metellus Pius, whom they appointed as governor of Hispania Ulterior, to counter this threat. He encamped at Metellinum (Medellin) and made several incursions against the Celtiberians and the Vaccaei of central Hispania who had allied with Sertorius. Two years of guerrilla tactics by Sertorius wore him down. Lucius Hirtuleius, Setrorius' lieutenant, defeated Marcus Domitius Calvinus, the governor of Hispania Citerior. Marcus Perpenna Vento, who had fought against Sulla, fled to Hispania with an army and wanted to fight Quintus Caecilius Metellus on his own. His soldiers were dissatisfied with his command and when they heard that Pompey was coming to Hispania with enemy forces they demanded to be taken to Sertorius. Marcus Perpenna yielded reluctantly. Pompey was pushed back by Sertorius, but Caecilius Metellus defeated Lucius Hirtuleius near Italica. In 75 BC, Caecilius Metellus defeated and killed Lucius Hirtuleius. Sertorius fought Pompey in an indecisive battle. Then Sertorius was defeated by Pompey and Caecilius Metellus. In 74 BC, Caecilius Metellus and Pompey concentrated their operations against the Celtiberians and Vaccaei. During 73 BC, there were tensions between the Sertorians and their native allies. Then Marcus Perperna assassinated Sertorius. Finally, Marcus Perperna was ambushed and captured by Pompey. Julius Caesar's Civil War In 49 BC, Julius Caesar invaded Italy, effectively declaring war on the Roman Senate. Pompey, the leader of the forces of the Senate, fled to Greece. Caesar executed an extraordinary 27-day forced march