Rubuta ci gaba ga wannan sakin layi - A watan Fabrairun 1847, ya shiga rundunarsa a Cape. Yaƙin Kaffir na farko
ya fashe, kuma Buller an nada shi a lokaci guda zuwa umurnin brigade, kuma daga bisani na 2nd Division. A watan Satumbar 1847 an nada shi mataimakin kwamandan Sir George Berkeley a yaƙin neman zaɓe a tsaunukan Amatola, inda rundunarsa ta bi Sandilli da zafi har shugaban ya mika wuya ga Buller a ranar 19 ga Oktoba. An sanar da shi a matsayin Abokin Order na Bath a watan Disamba na 1847. A cikin 1848 ya yi aiki a ƙarƙashin Sir Harry Smith a cikin Yaƙin da aka yi da Pretorius, kuma a ranar 29 ga Agusta ya jagoranci harin a kan Boomplaats, inda ya ji rauni sosai, kuma an kashe dokinsa a ƙarƙashinsa. Yanzu batalayinsa ya dawo gida, amma a shekara ta 1852 an sake umurce shi da ya tafi tare da rundunarsa zuwa Cape. A matsayin shugaban brigade a cikin rukunin Janar Somerset ya ƙone kraals a Waterkloof a Yaƙin Kaffir na biyu, kuma ya kasance a yakin Berea, inda Sir George Cathcart ya gode masa a bainar jama'a, kuma a ƙarshe ya sami nasarar Somerset a cikin umurnin rabonsa a watan Agusta 1852.