Rubuta ci gaba don wannan sakin layi - Bayan Italiya ta shiga Yaƙin Duniya na II a watan Yuni na 1940, "Trento" ya ga manyan ayyuka a cikin Tekun Bahar Rum, ciki har da yaƙe-yaƙe na Calabria, Cape Spartivento, da Cape Matapan a Yuli da Nuwamba 1940 da Maris 1941, bi da bi. Ta kuma kasance a lokacin da ba a yanke hukunci ba na farko
da kuma yakin Sirte na biyu, kuma a karshen ta yi mummunar lalacewar wani jirgin ruwa na Birtaniya. Har ila yau, "Trento" yana da alhakin sau da yawa tare da rakiyar jiragen ruwa don samar da dakarun Italiya a Arewacin Afirka da kuma dakatar da jiragen ruwa na Birtaniya zuwa Malta. A lokacin daya daga cikin ayyukan na karshe don kai farmaki ga rundunar sojojin Birtaniya ta Operation Harpoon a watan Yunin 1942, "Trento" ya yi garkuwa da shi sau biyu, da farko ta hanyar Bristol Beaufighter torpedo bomber sannan kuma ya nutse ta hanyar jirgin ruwa tare da asarar rayuka masu yawa.