History
The peoples of the south — Nilotic groups such as the Dinka, Nuer, and Shilluk, and many others — long resisted incorporation by powers to the north, and nineteenth-century slave raiding from the Nile deepened the divide. Under British-Egyptian rule Sudan's south was administered separately and left undeveloped. When Sudan became independent in 1956, southern fears of domination by Khartoum triggered the First Sudanese Civil War (1955–72).
A second, longer war began in 1983, led by John Garang's Sudan People's Liberation Movement/Army against the northern government, and killed an estimated two million people before the Comprehensive Peace Agreement of 2005 granted the south autonomy and the promise of a referendum. In January 2011 almost 99 per cent of southern voters chose to secede, and the Republic of South Sudan became independent on 9 July 2011.
Peace did not hold. In December 2013 a political rupture between President Salva Kiir, a Dinka, and his former deputy Riek Machar, a Nuer, spiralled into a civil war marked by ethnic massacres, mass displacement, and localised famine. A peace agreement led to a fragile unity government in 2020, but promised elections have been repeatedly postponed — most recently to December 2026 — and fighting intensified again in 2025 in several states. Machar was placed under house arrest in March 2025 and later charged with treason, murder and crimes against humanity, and his trial opened that September, leaving the deal badly frayed. More than 1.3 million people, most of them South Sudanese returnees, have also crossed into the country from the war in Sudan since 2023.
- South Sudan: The Newest Country — The world's youngest state, born in 2011 after one of Africa's longest civil wars — and plunged within two years into a war of its own, between the leaders who had won independence together
