Kammala jumla mai zuwa: Bayan da yake shakedown cruise tare da Gabashin Gabas da kuma a cikin ruwa na Cuban, "Parker" ya yi aiki a matsayin mai ba da umurni ga Arewacin Afirka, ya shiga cikin harin da aka yi a Mehedia da Port Lyautey 7 Nuwamba 1942. Bayan dawowarsa zuwa Atlantic Coast, "Parker" ya biye da jiragen ruwa zuwa tashar jiragen ruwa na Arewacin Afirka a lokuta biyar. A na huɗu, ta goyi bayan
Harin Sicilian 5 zuwa 13 ga Yuli, 1943. Bayan haka an ba da izinin ba da izinin ba da izini ga Birtaniya da kuma Bahar Rum. Ranar 6 ga watan Nuwamba, lokacin da jiragen sama 30 suka kai hari a kan jirgi, "Parker" ya harbe goma sha biyar.