However , the Portuguese raised a much larger force , mainly of auxiliaries from the Nguni peoples , that broke the back of the rebellion by the end of 1917 .
Fighting on a smaller scale continued through 1918 .
However , the Portuguese raised a much larger force , mainly of auxiliaries from the Nguni peoples , that broke the back of the rebellion by the end of 1917 , although fighting on a smaller scale continued through 1918 .