The Battle of Mount Gaurus, 343 BC, was the first battle of the First Samnite War and also the first battle fought between the Roman Republic and the Samnites. The battle is described by the Roman historian Livy as part of Book Seven of his history of Rome, Ab Urbe Condita Libri, where he narrates how the Roman consul Marcus Valerius Corvus won a hard-fought battle against the Samnites at Mount Gaurus, near Cumae, in Campania. Modern historians however believe that most, if not all, of the detail in Livy's description has been invented by him or his sources.