Almada and Asfada could produce and supply milk, but Hamasein, Abhasheila and Wilinnoho were not allowed to. The Nabtabs also levied taxes and collected periodic tributes from his serfs. According to Paul, ever since Amer Kunu came to power, intermarriage between Nabtab and Tigre castes were forbidden and the caste distinctions were strictly enforced. This was successfully accomplished by the small elite, states Paul, through the "force of arms". Livelihood They lead a tribal pastoral life, with those in the northern territories raising camels, and the southerners raising cattle. In contemporary era, many have adopted a farming lifestyle and become migrant wage labor providers. References Bibliography Anglo-Egyptian Sudan, ed. Count Gleichen (London, 1905); A. H. Keane, Ethnology of Egyptian Sudan (1884); Ethnic groups in Sudan Afroasiatic peoples Ethnic groups in Eritrea Ethnic groups in Ethiopia Cushitic-speaking peoples