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1 [1] (May 9, 2025)

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sa Congressional Research Service
         Inforrning the legislative debate since 1914


South Sudan
Peace has been elusive in South Sudan, which, with U.S.
support, became the world's newest country in 2011. The
civil war that erupted there in late 2013 featured widespread
sexual violence, mass killings, and other atrocities. It
displaced over a third of the population and fueled Africa's
largest refugee crisis for a decade. An estimated 400,000
people died as a result of the war before the most recent
peace deal was signed in 2018. Whether that ended the war
is debated. Conflict has continued to plague the country,
and the situation is deteriorating in 2025 as hostilities rise.
South Sudan ranks as one of the world's poorest and most
fragile states, the most corrupt, and one of the least free. Its
security forces have mutilated, tortured, beat, and harassed
political opponents, journalists, and human rights activists,
per the State Department, and targeted government critics
outside the country. President Salva Kiir's government has
repeatedly delayed what would be the first elections since
independence. Kiir's regime arrested First Vice President
Riek Machar, his leading rival and co-signatory on the 2018
peace deal, in March, accusing him of inciting rebellion.
The United States, which facilitated the 2005 peace deal
that enabled South Sudan's independence from Sudan, has
been the country's largest aid donor and the penholder on
the issue in the UN Security Council. Congressional
interest, driven historically by humanitarian and human
rights concerns, has shaped U.S. policy toward what is now
South Sudan for decades. The U.S. Embassy continues to
press for implementation of the peace deal and has called
for Machar's release and a return to dialogue.

Humanitarian Situation
South Sudan faces a severe humanitarian crisis that has
grown  over the past decade: per UN estimates, 9.3 million
people (three-quarters of the population) need aid in 2025;
7.7 million face acute food insecurity. Over 1.8 million are
internally displaced; 2.3 million are refugees in neighboring
countries. Widespread flooding since 2019 has added to
displacement and food insecurity. South Sudan ranks as one
of the countries most vulnerable to natural hazards and
climate change impacts and as one of the most dangerous
countries for aid workers. Sudan overtook South Sudan as
Africa's largest refugee crisis in 2024; South Sudan has
faced an influx of over a million refugees and returnees
from Sudan, straining communities and aid operations.
Competing  donor priorities and increasing costs have led to
humanitarian funding gaps since 2020, forcing aid agencies
to reduce assistance amid rising needs. U.S. assistance has
routinely comprised over half of all humanitarian funding
for South Sudan. The Trump Administration's foreign aid
pause and cuts, which have drawn congressional debate,
have reportedly disrupted some life-saving programs; Save
the Children has cited them as a factor in several deaths.
The State Department says that the United States continues
to provide critical, life-saving assistance in South Sudan.


Updated May  9, 2025


F


Source: CRS map. Figures from CIA and IMF reference databases.
Background and Context
South Sudan's independence followed a vote for secession
from Sudan after almost 40 years of rebellion. Decades of
war had inhibited the development of human capital, basic
infrastructure, and formal institutions, fueling humanitarian
needs that persisted after independence, despite rich natural
resources, including oil fields that once generated 75% of
Sudan's oil production. As former rebels, South Sudan's
leaders had little experience governing, and corruption and
conflict slowed post-war recovery and development.
The civil war in Sudan that led to South Sudan's secession
is often characterized as a north-south struggle, but fighting
among  southern rebel commanders nearly derailed the
south's bid for self-determination. Leaders in the Sudan
People's Liberation Movement/Army  (SPLM/SPLA)   vying
for power mobilized their supporters along ethnic lines, and
Sudan's government fueled SPLM  divisions by financing
breakaway  factions (a tactic Kiir has adopted). The rebel
factions reconciled in the early 2000s, helping the SPLM
form a united front in peace talks with Sudan's government,
culminating in the 2005 Comprehensive Peace Agreement
(CPA). Under  the CPA, Sudan remained unified for a six-
year interim period before southerners voted on separation.
After the CPA, the SPLM became  the south's ruling party.
With the death of longtime SPLM leader John Garang just
months after the CPA signing, the south lost its leading
advocate for a united Sudan, and in 2011, over 98% of its
voters chose secession. The new country was awash in
small arms, and grievances fueled local rebellions and
intercommunal  violence. The SPLA, which became South
Sudan's army, responded with violent, ethnically targeted
disarmament campaigns. Maneuvering  ahead of the first
post-independence elections planned for 2015 added to
these dynamics. A 2013 cabinet reshuffle, in which Kiir
dismissed his vice president, Riek Machar, formalized a
major fissure in the SPLM. Tensions rose as Machar and
other SPLM  leaders accused Kiir of becoming increasingly
dictatorial, and erupted in December 2013, as the party
convened to choose its presidential candidate for the polls.

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