sentences:  This strategy initially worked, but as a nationalist and paramount chief of all the Xhosa, he was later drawn into conflict with the British by the neighbouring Ngqika Xhosa.His Kingdom's indirect aid to the Ngqika during the Seventh and Eighth Frontier Wars (1846–1853) was discovered and led to a temporary white invasion of Gcalekaland.Sarili played an important part in the Great Cattle Killing, a millennialist movement which began among the Xhosa in 1856, and led them to destroy their own means of subsistence in the belief that it would bring about salvation by supernatural spirits, who would return and drive the white people into the sea.