Rubuta ci gaba ga wannan sakin layi - Bayan da yake motsawa zuwa gabar gabashin Amurka, "Mainstay" ya shiga shakedown a Chesapeake Bay kuma ya shiga Rukunin Ruwa na 32 a ranar 21 ga Yuli. Kwana uku bayan haka sai ya tashi zuwa Bahar Rum, kuma, a matsayin mai kula da jirgin UGS-49, ya isa Oran, Algeria, ranar 10 ga Agusta. A ranar 15 ga watan ya tashi don ayyukan minesweeping don tallafawa mamayewar Allied na kudancin Faransa
a bakin tekun Provence. Ta rufe bakin tekun Faransa a ranar 20 ga watan Agusta, kuma a cikin watanni biyu masu zuwa sai ta shafe ma'adinan abokan gaba daga Marseilles, Faransa, zuwa San Remo, Italiya. Yayin da yake share ruwan bakin teku tsakanin Menton, Faransa, da Ventimiglia, Italiya, ya zo ne a karkashin wuta daga batura na bakin teku na Jamus a ranar 9 da 10 ga watan Satumba kuma ya shiga cikin bindigogi na abokan gaba tare da bindigogi na 3-inch. Bugu da ƙari, ta taimaka wajen kawar da harin da aka yi a karkashin ruwa, mutum daya "torpedoes" a kan bindigogi na bindigogi a ranar 10.