The Battle of Volturnus or Volturno refers to a series of military clashes between Giuseppe Garibaldi's volunteers and the troops of the Kingdom of Two Sicilies occurring around the river Volturno, in northern Campania, in September and October 1860. The main battle took place on October 1, 1860 between 24,000 garibaldines (with Hungarian volunteers) and 25,000 Bourbon troops.