Ethnic violence in South Sudan
Ethnic violence in South Sudan has a long history among South Sudan's varied ethnic groups. South Sudan has 64 tribes with the largest being the Dinkas, who constitute about 35% of the population and predominate in government. The second largest are the Nuers. Conflict is often aggravated among nomadic groups over the issue of cattle and grazing land and is part of the wider Sudanese nomadic conflicts.
In 2010, Dennis Blair, the United States Director of National Intelligence, issued a warning that "over the next five years,...a new mass killing or genocide is most likely to occur in southern Sudan." In April 2017, Priti Patel, the Secretary of the United Kingdom's Department for International Development, declared the violence in South Sudan as genocide.