Kammala jumla mai zuwa: "Desaix" da "Kléber" an sake dawo da su a watan Yulin 1914 kuma an sanya su zuwa Rukunin 3rd Light (DL)) na 2nd Light Squadron wanda aka ba shi aikin kare tashar Turanci tare da Burtaniya. Rukunin ya kasance a tashar a yammacin ƙarshen Channel a ranar 4 ga watan Agusta, inda aikinsu ya kasance don tsayar da jigilar jiragen ruwa na Jamus da kuma samar da nesa ga ƙananan jiragen ruwa da ke rakiyar jirgi a cikin Channel. Ingantaccen kariya a cikin Channel da kwanciyar hankali na gaba a farkon 1915 ya ba da damar a saki jiragen ruwa daga ayyukansu, don haka aka sanya "Desaix" ga Squadron na 3 lokacin da ta isa Gabashin Bahar Rum a ranar 16 ga Fabrairu. An ba wa rundunar aikin yin sintiri tsakanin Port Said, Misira, da Alexandretta, Ottoman Syria. An cire jirgin a watan Mayu don taimakawa rundunar sojan ruwa ta 1 a tsakiyar Bahar Rum tare da neman jiragen ruwa na Jamus kusa da tashar jiragen ruwa na Italiya. Ta koma cikin Squadron na 3 kuma an ba ta aikin taimaka wa toshe gabar tekun Ottoman kusa da iyakar Turkiyya da Siriya. Ya bambanta da 'yar'uwarta, "Kléber" an canja shi zuwa
Dardanelles don tallafawa sojojin Allied a cikin Gallipoli Campaign a watan Mayu inda ta shiga cikin Dardanelles Squadron tare da "Dupleix" kuma an sanya su don toshe bakin tekun Asiya Ƙananan. "Kléber" ya yi karo da jirgin ruwan sojan ruwa na Royal Australian Navy HMT "Boorara" a cikin Tekun Aegean a ranar 17 ga Yuli, ya lalata gabanta. Bayan da Masarautar Bulgaria ta shiga Tsakiyar Tsakiya a tsakiyar watan Oktoba, "Kléber" na ɗaya daga cikin jiragen ruwa da aka ba su aikin kai hari ga gabar tekun Aegean na Bulgaria a ranar 21 ga Oktoba.