He established the First Triumvirate with Pompey and Crassus (60), and became consul in 59. Between 58 and 51 he fought the Gallic Wars, invaded Britain (55-54), and acquired immense power. After civil war with Pompey, which ended in Pompey’s defeat at Pharsalus (48), Caesar became dictator of the Roman Empire; he was murdered on the Ides (15th) of March in a conspiracy led by Brutus and Cassius