An in-depth analysis of the security sector's dominant role in South Sudan's political economy. It examines the evolution of the South Sudan People's Defence Forces, the challenges of integrating opposition forces and tribal militias, and the fiscal impact of opaque defense spending. It also outlines border security issues and the legacy of human rights abuses.
Educational content only — not personalized financial, legal, or tax advice.
The security sector of South Sudan is perhaps the most influential force in the country's political economy. Since gaining independence on July 9, 2011, the state's military apparatus has played a dual role: acting as both the defender of national sovereignty and a primary driver of internal political-military instability. The security landscape of South Sudan is highly fragmented, consisting of the formal military, regional opposition forces, ethnic-based tribal militias, and international peacekeeping forces.
The evolution of these armed groups is deeply intertwined with the country's long struggle for self-determination and the subsequent internal conflicts that broke out in 2013 and 2016. Understanding the security dynamics of South Sudan requires analyzing the structure of the national army, the challenges of integrating rival factions, the fiscal implications of opaque military spending, and the legacy of conflict that continues to shape the oil-dependent economy.
The South Sudan People's Defence Forces (SSPDF) serves as the official state military of the Republic of South Sudan. Formerly known as the Sudan People's Liberation Army (SPLA), the military was renamed SSPDF in 2018 in an effort to present a more professional and nationally representative force, moving away from its historical roots as a guerrilla movement.
The SPLA was founded in 1983 under the leadership of Dr. John Garang de Mabior to fight against the central government in Khartoum during South Sudan: A Financial History.
For over two decades, the SPLA operated as a highly decentralized guerrilla army, relying on regional commanders who maintained strong ethnic and personal loyalty from their troops. Following independence, the transition of this guerrilla force into a professional national army was hampered by political rivalries and a lack of institutionalized command-and-control structures, leading to the rapid fracturing of the military along ethnic lines when the civil war broke out in 2013.
The historical splits within the SPLA continue to exert a powerful influence on modern military relations. The most significant historical fracture occurred in 1991, when Riek Machar and senior commanders split from John Garang to form the SPLA-Nasir faction, which initiated decades of ethnic-based violence between Dinka and Nuer combatants.
Although various factions periodically reunited for political convenience, these historical trauma lines were instantly re-activated when political tensions rose in Juba in 2013. This legacy has made the establishment of a neutral, professional national military extremely difficult, as individual divisions frequently operate as ethnic enclaves loyal to specific political personalities rather than the state.
The SSPDF is divided into two primary branches: the Land Forces (commonly referred to as the Army) and the Air Force. The Land Forces represent the overwhelming majority of the military's personnel and operational capabilities. The army is organized into several regional divisions, each commanded by senior generals who often exercise significant local political influence.
The operational capabilities of the Land Forces are focused on conventional infantry tactics, with a reliance on heavy weaponry, including T-72 main battle tanks and various artillery systems procured from international suppliers.
The South Sudan Air Force, by contrast, is extremely small and primarily focused on transport and utility operations. Its fleet consists of a limited number of Mi-17 transport helicopters and Mi-24 attack helicopters, which have been used to provide air support during counter-insurgency operations.
Due to the country's severe economic reconstruction challenge and lack of technical schools, the Air Force relies heavily on foreign contractors for maintenance, logistics, and pilot training, highlighting the broader technical and professional challenges facing the entire military apparatus.
The land forces operate through a decentralized division structure, with key units positioned in volatile border areas and oil production centers, such as Renk, Malakal, and Torit. These regional divisions frequently function as self-financing administrative units.
When central salary payments from the Ministry of Finance are delayed for months—a common occurrence—divisional commanders rely on local revenue extraction. This includes setting up illegal checkpoints along commercial trade corridors, levying informal taxes on local agricultural producers, and participating in commercial charcoal and timber exploitation. This financial autonomy erodes central command-and-control, transforming regional military divisions into feudal-like structures that resist national integration.
Military finance in South Sudan is characterized by a complete lack of transparency and legislative oversight. Despite the signing of the peace agreement, the security sector continues to consume a disproportionate share of the national budget, often at the expense of vital social sectors such as education, healthcare, and infrastructure.
The formal defense budget approved by the parliament represents only a fraction of actual military expenditure. The ruling elite in Juba has historically utilized off-budget mechanisms—primarily direct allocations from oil revenues—to finance military operations and purchase weapons.
The Bank of South Sudan (BoSS) and the Ministry of Finance have frequently diverted public funds directly to military commanders to maintain their loyalty and fund counter-insurgency campaigns.
This highly militarized public spending has starved other sectors of capital, preventing South Sudan from realizing its agricultural potential and resources and trapping the population in a state of perpetual economic insecurity.
The primary mechanism for off-budget military funding has been the state oil company, Nilepet. Investigative reports have documented how Nilepet revenues, which should be deposited directly into the central treasury, are frequently diverted to fund the operations of the National Security Service (NSS) and local military campaigns.
Because these transactions occur outside the formal budget process, they are never reviewed by the National Legislative Assembly or audited by the Auditor General. This parallel financial network has allowed senior military elites to accumulate massive personal wealth while leaving the rank-and-field soldiers in the barracks without food, uniforms, or medical care, fueling corruption and unrest.
The primary military rival to the SSPDF is the Sudan People's Liberation Army-In-Opposition (SPLA-IO), which serves as the armed wing of the political movement led by First Vice President Riek Machar. The SPLA-IO was formed in early 2014 following the outbreak of the civil war, drawing its ranks from mutinous SPLA soldiers and ethnic Nuer militias.
The SPLA-IO operates under its own command structure, separate from the national army, with its primary strongholds in the Greater Upper Nile and parts of the Equatoria regions.
Over the years, the SPLA-IO has faced its own internal divisions, with several prominent commanders breaking away to form independent factions, such as the Kitgwang faction led by General Simon Gatwech Dual.
This fragmentation of armed groups has complicated the peace process, as peace agreements negotiated with the central leadership in Juba do not always bind local commanders on the ground, leading to localized skirmishes and instability that threaten South Sudan: Government Structure.
The logistical and financial isolation of the SPLA-IO has further complicated their integration into the national system. Lacking a formal budget allocation from Juba, SPLA-IO forces have had to survive by exploiting local resources in their territory, which has led to intense competition over gold mining in Equatoria and agricultural trade in Upper Nile.
The political leadership of the SPLM-IO in Juba is frequently accused by field commanders of neglecting the welfare of their troops, leading to frequent defections of entire divisions to the SSPDF. This constant shifting of military allegiances creates a highly unstable security dynamic, where peace is maintained through temporary financial payouts rather than structural integration.
In addition to the formal military factions, the security landscape of South Sudan is heavily influenced by community-based tribal militias and local armed groups. The most famous of these is the Nuer "White Army," a loose coalition of youth armed groups in the Greater Upper Nile region who mobilize to defend Nuer communities and cattle herds.
Similarly, Dinka communities have formed civil defense forces known as the "Titweng" (meaning "protect the cattle") or "Gelweng."
These community-based armed groups are highly decentralized and primarily focused on local security issues, such as cattle raiding and land disputes.
However, during the civil war, national political leaders frequently mobilized these tribal militias for national military campaigns, providing them with modern weapons and ammunition. This proliferation of small arms among civilian populations has fueled local inter-communal violence, making rural areas highly unstable and making the regulation of South Sudan: Government Structure and other civil institutions difficult to enforce.
The militarization of rural youth has altered traditional social systems. Historically, cattle-raiding was a ritualized practice regulated by community elders who negotiated peace and compensation through customary assemblies.
The supply of modern assault rifles has bypassed this traditional authority, placing military power directly in the hands of young, heavily armed men.
Because these youth lack formal employment opportunities in the stagnant economy, cattle-raiding has transformed into a commercial enterprise, with local politicians and military officers coordinating raids to fund their own activities, creating a self-sustaining cycle of violence.
The cornerstone of the 2018 Revitalized Peace Agreement (R-ARCSS) is Chapter II, which outlines a comprehensive framework for Security Sector Reform (SSR) and the creation of a "Necessary Unified Forces" (NUF). The agreement mandates the cantonment, screening, training, and integration of rival SSPDF, SPLA-IO, and other opposition fighters into a single, unified national military and police force.
The implementation of this unified forces concept has faced immense challenges. Cantonment sites have frequently suffered from severe shortages of food, clean water, and medicine, leading to high rates of desertion.
Further, political disagreements over the graduation and rank allocation of unified officers have repeatedly delayed the process.
While the first phase of unified forces finally graduated in late 2022 and 2023, many remain un-deployed or lack weapons due to the ongoing international arms embargo. The failure to fully integrate and professionalize these rival forces represents the single greatest threat to the survival of the peace agreement and the overall stability of the state.
The rank inflation within South Sudan’s armed forces has been a major administrative barrier to unification. During the civil war, both sides handed out senior military ranks to local militia commanders to ensure their political loyalty.
Consequently, the country possesses an absurdly high number of generals, with some estimates suggesting that South Sudan has more active generals than the United States.
Negotiating how to downsize this top-heavy officer corps without provoking a mutiny has paralyzed the Security Sector Reform process, as senior officers refuse to accept lower ranks or retire without substantial financial compensation, which the government’s empty treasury cannot afford.
South Sudan’s security dynamics are heavily influenced by its porous borders and relations with neighboring states. The country shares strategic and highly volatile borders with Sudan, Ethiopia, Kenya, Uganda, the Democratic Republic of the Congo (DRC), and the Central African Republic (CAR).
The border with Sudan remains a major geopolitical flashpoint, particularly the disputed, oil-rich area of Abyei and the Heglig oil fields. The outbreak of civil war in Sudan in April 2023 has further complicated this relationship, driving hundreds of thousands of refugees into South Sudan and threatening the safety of the oil pipelines that run through Sudanese territory to the Red Sea.
Additionally, South Sudan’s southern border with the DRC and Uganda has historically been destabilized by regional armed groups, such as the Lord's Resistance Army (LRA).
Managing these complex border dynamics requires a highly professional and well-resourced military, which the current state apparatus is unable to provide due to ongoing economic and political crises.
To protect civilians and support the implementation of peace agreements, the United Nations has maintained a massive presence through the United Nations Mission in South Sudan (UNMISS) since July 2011. UNMISS operates with a robust Chapter VII mandate, authorizing the use of force to protect civilians under threat of physical violence.
UNMISS maintains several "Protection of Civilians" (PoC) sites across the country, which have provided safe haven to hundreds of thousands of displaced persons fleeing ethnic violence.
The mission also plays a vital role in monitoring human rights abuses, delivering humanitarian aid, and supporting the implementation of the R-ARCSS.
However, relations between UNMISS and the national government have frequently been tense, with Juba occasionally accusing the UN of violating its national sovereignty, while international observers criticize the state's security forces for restricting the movement of peacekeepers.
Decades of intense conflict have left a devastating social and human rights legacy in South Sudan, with one of the most pressing challenges being the recruitment and use of child soldiers. During both the liberation struggle against Khartoum and the post-independence civil wars, all major armed factions, including the SSPDF and SPLA-IO, systematically recruited children to serve as combatants, messengers, and guards.
Despite official commitments to demobilize all child soldiers, the practice has persisted due to ongoing localized conflicts and a lack of educational and economic opportunities for youth.
International human rights organizations have repeatedly documented severe abuses committed by security forces, including extrajudicial killings, sexual violence, and the destruction of civilian infrastructure.
Addressing these human rights abuses and establishing accountability mechanisms, such as the Hybrid Court for South Sudan mandated by the peace agreement, remain vital to break the cycle of violence and foster national reconciliation.
The security sector of South Sudan is a complex and highly militarized network that continues to dominate the state's political and economic life. While the SSPDF has evolved from a guerrilla movement into a nominal national army, it remains deeply fractured by ethnic loyalties and institutional weakness.
The persistence of regional armed groups and tribal militias highlights the limitations of state authority, while opaque defense spending continues to starve the economy of vital development resources.
Achieving long-term stability in South Sudan is impossible without comprehensive security sector reform, the successful integration of unified forces, and a commitment to transparency in military finance. Only by transitioning from an economy of war to a system of democratic, professional security oversight can South Sudan hope to secure its borders and build a peaceful future for its citizens.