Commentarii de Bello Civili, or Bellum Civile, is an account written by Julius Caesar of his war against Gnaeus Pompeius and the Roman Senate. It consists of three books covering the events of 49–48 BC, from shortly before Caesar's invasion of Italy to Pompey's defeat at the Battle of Pharsalus and flight to Egypt. It was preceded by the much longer account of Caesar's campaigns in Gaul and was followed by similar works covering the ensuing wars against the remnants of Pompey's armies in Egypt, North Africa, and Spain. Caesar's authorship of the Commentarii de Bello Civili is not disputed, while the three later works are believed to have been written by contemporaries of Caesar.