Yaƙin Mons Lactarius ya faru a cikin 552 ko 553 a lokacin Yaƙin Gothic da aka yi a madadin Justinian I akan Ostrogoths a Italiya.Bayan yakin Taginae, inda aka kashe Sarkin Ostrogoth Totila, Janar Narses na Byzantine ya kama Roma kuma ya kewaye Cumae.Teia, sabon sarkin Ostrogothic, ya tattara ragowar sojojin Ostrogothic kuma ya yi tafiya don taimakawa wajen kewaye, amma a cikin Oktoba 552 (ko farkon 553) Narses sun yi masa kwanton bauna a Mons Lactarius (Monti Lattari na zamani) a Campania, kusa da Dutsen Vesuvius da Nuceria Alfaterna. .An kwashe kwanaki biyu ana gwabzawa, kuma an kashe Teia a fadan.An kawar da ikon Ostrogothic a Italiya, kuma yawancin sauran Ostrogoths sun tafi arewa kuma (sake) sun zauna a kudancin Austria.Bayan yakin, an sake mamayeItaliya , a wannan karon na Franks, amma su ma sun ci nasara, kuma yankin ya sake komawa cikin Daular.