Rubuta ci gaba don wannan sakin layi - Rundunar sojojin biyu na kasashen waje sun shiga cikin yaki a Italiya da Austrians a matsayin wani ɓangare na MacMahon na II Corps. Lokacin da Austrians suka yi yaƙi da Piedmont a watan Afrilu na 1859, an tura rundunar sojojin waje ta 1 zuwa Corsica da fatan karfafa matsayinta tare da masu sa kai na Corsican; a watan Mayu rundunar sojojin waje ta 1 ta isa Genoa. Rundunar 'yan kasashen waje ta 2 ta isa Genoa a watan Mayu kuma ta tashi daga Oran. An kafa brigade daga rundunonin biyu kamar yadda Rundunar Kasashen waje ta 1 ba ta da ƙarfi tare da sama da mutane 600 a cikin sahu. Rundunar ta shiga cikin yakin Magenta
inda II Corps ya taka muhimmiyar rawa a nasarar Faransa da kuma Legion na waje ya yi kyau. A ranar 7 ga Yuni, 1859, sojojin Legion a Italiya sun shiga birnin Milan don farin cikin Milanese. Bayan yaƙin da ba a da ƙarfi ba 1st Foreign Regiment ya kasance a Milan don ɗaukar ma'aikata. A halin yanzu, Rundunar 'Yan Kasashen waje ta 2 ta shiga cikin sojojin Faransa na makonni biyu na Austrians wanda ya ƙare a cikin nasara na Faransa a Solferino.