History of First Sudanese War: How and When did it Erupt?
The First Sudanese Civil War, a pivotal conflict in the history of Sudan, lasted from 1955 to 1972. This war was primarily fought between the northern part of Sudan and the southern regions, and was marked by ethnic, cultural, and religious disparities. The war was not only significant in terms of its duration and the human toll it took but also for setting the stage for future conflicts in Sudan, eventually leading to the secession of South Sudan in 2011.
In the following article, World History Edu explores the history, causes, significant events, and consequences of the First Sudanese Civil War, examining its effects on Sudan and its implications for the international community.
Background and Causes
The roots of the First Sudanese Civil War can be traced back to the colonial era. Sudan was jointly administered by the British and the Egyptians in a condominium arrangement starting in 1899. This administration, however, was skewed in favor of developing the northern part of Sudan, which was more culturally and religiously aligned with the Middle East, particularly in terms of Islamic religion and Arabic language.
In contrast, the southern part of Sudan was predominantly non-Arab and non-Muslim, with a variety of tribal groups practicing Christianity or indigenous religions.
The disparities imposed by colonial policies continued even after Sudan gained independence in 1956. The new Sudanese government, dominated by northern elites, failed to address the economic and political grievances of the southern regions.
Furthermore, the government attempted to Arabize and Islamize the administration and public education in the south, leading to increased tensions and feelings of marginalization among the southern populations.
The Outbreak of War
Tensions escalated into full-scale conflict in 1955, just prior to Sudan’s declaration of independence. Southern soldiers in the Sudanese army stationed in Torit mutinied against their northern commanders.
The immediate cause was the transfer of these southern units to the north, which was seen as a move towards further domination and suppression by the northern government. Although the Torit mutiny was quickly suppressed, it sparked widespread unrest across the south, leading to the emergence of guerrilla warfare against northern forces.

The First Sudanese Civil War involved the northern part of Sudan and the southern region, which sought greater representation and regional autonomy. Image: The map of Sudan in 2011.
Did you know…?
The First Sudanese Civil War is also known as the Anyanya Rebellion. The name “Anyanya” comes from the Madi language, meaning ‘snake venom,’ aptly describing the deadly nature of the guerrilla tactics employed by the southern insurgents.
The Course of the War
The conflict was characterized by its guerrilla nature, with southern rebels engaging in hit-and-run attacks against northern military installations and convoys. The southern resistance was initially disorganized, with multiple local leaders.
Over time, however, the movement became more coordinated, especially with the formation of the Anya Nya guerrilla group in the early 1960s. Anya Nya, meaning ‘snake venom’, became the most prominent group fighting for the southern cause, drawing its members from various southern tribes.
The war was brutal and marked by significant atrocities committed by both sides. The northern government’s military response was often heavy-handed, involving aerial bombings and scorched-earth tactics.
This approach led to massive displacement and considerable suffering among the civilian population. On the other hand, the Anya Nya guerrillas also committed acts of violence, particularly against northern traders and administrators in the south.

The war was devastating, with about a million people losing their lives due to combat, famine, and disease—all exacerbated by the conflict. The southern region suffered massive displacement and destruction of infrastructure, setting back economic and social development by decades. Image: Flag of the Anya Nya guerrilla group.
International Dimensions and Influence
The First Sudanese Civil War also had an international dimension. The Cold War era saw both the Soviet Union and the United States, along with neighboring African countries, taking interests in Sudan’s conflict, often providing support to different groups based on strategic interests. Israel, for instance, supported the southern rebels as part of its periphery doctrine, aimed at surrounding enemy Arab states with allied non-Arab states or groups.
The Addis Ababa Agreement
After nearly 17 years of conflict, with hundreds of thousands of lives lost and no decisive victory in sight for either side, international pressure and war fatigue led to peace negotiations. These culminated in the Addis Ababa Agreement in 1972, brokered by the World Council of Churches and the All Africa Conference of Churches. The agreement granted the south a measure of autonomy, establishing the Southern Sudan Autonomous Region, with its own regional government and control over certain domestic matters.
Terms and Impact of the Peace Agreement
The Addis Ababa Agreement was a landmark in Sudanese history. It provided for the establishment of a Southern Sudan Legislative Assembly, the integration of Anya Nya fighters into the Sudanese army, and the abolition of Islamic law (Sharia) in the south. This peace agreement significantly reduced the conflict for about a decade and brought temporary respite to the region, allowing for some development and stability.
Long-term Consequences
Despite the temporary peace, the underlying issues of governance, development disparities, and cultural autonomy were not fully addressed. Resentment and mistrust continued to fester, and the discovery of oil in the south in the late 1970s added a new dimension to the conflict.
These unresolved issues eventually contributed to the outbreak of the Second Sudanese Civil War in 1983, which was even more devastating and complex, involving multiple factions and foreign interests.

History & Major Facts about the Second Sudanese Civil War (1983-2005)
FAQs
These questions cover the key points of the conflict, its causes, progression, and aftermath, providing a comprehensive understanding of the First Sudanese Civil War’s impact on Sudan’s history.
What was the First Sudanese Civil War also known as?
The First Sudanese Civil War was also known as the Anyanya Rebellion or Anyanya I, named after the rebels. “Anyanya” comes from the Madi language and means ‘snake venom,’ which aptly describes the deadly guerrilla tactics employed by the southern insurgents.
What were the primary causes of the First Sudanese Civil War?
The war was primarily caused by the southern region’s demand for greater representation and regional autonomy against the northern part of Sudan, which attempted to impose Islamic and Arabic policies on the culturally distinct and predominantly animist and Christian south.
How many major stages were there in the First Sudanese Civil War?
The war can be divided into four major stages. It began with initial guerrilla warfare, characterized by sporadic and disorganized attacks by southern rebels against northern forces. This phase set the stage for the southern grievances against the northern-dominated government, which was accused of imposing Islamic and Arabic policies on the culturally distinct and predominantly animist and Christian south.
The second stage involved the creation of the Anyanya insurgency. Anyanya was a structured guerrilla force that formed as a response to the Sudanese government’s neglect and oppressive policies towards the southern provinces. The insurgency grew in strength and coordination, managing significant, though not strategically decisive, attacks against government forces.
The third stage was marked by political strife within the government. The Sudanese government faced international and domestic criticism for its handling of the conflict, leading to political instability and several changes in governance, which further complicated the peace process.
The final stage was the establishment of the South Sudan Liberation Movement, a political wing of the Anyanya that sought to negotiate for peace and greater autonomy within a more federal system in Sudan. This stage was critical as it transitioned the conflict from purely military engagements to diplomatic negotiations.

The First Sudanese Civil War can be divided into four major stages: initial guerrilla warfare, the creation of the Anyanya insurgency, political strife within the government, and the establishment of the South Sudan Liberation Movement. Image: Flag used by the South Sudan Liberation Movement.
What role did the Anyanya insurgency play in the war?
The Anyanya insurgency was a structured guerrilla force that formed in response to the Sudanese government’s neglect and oppressive policies. It grew in strength and coordination, managing significant attacks against government forces.
What was the outcome of the Addis Ababa Agreement?
The Addis Ababa Agreement in 1972 officially ended the First Sudanese Civil War, recognizing the southern region as an autonomous zone. However, it only partially succeeded in addressing the deeper issues and did not fully resolve structural inequalities and identity-based grievances.
What were the consequences of the war on the southern region?
The southern region suffered devastating consequences, including about a million deaths and massive displacement. The war also resulted in significant destruction of infrastructure, severely setting back economic and social development.

How did the First Sudanese Civil War lead to the Second Sudanese Civil War?
The incomplete resolution and implementation of the Addis Ababa Agreement’s terms left unresolved tensions and issues, which contributed to the outbreak of the Second Sudanese Civil War in 1983.
What impact did the First Sudanese Civil War have on Sudan’s future?
The war left many critical issues unaddressed, setting the stage for continued national strife and eventually leading to the independence of South Sudan in 2011.

The Second Sudanese Civil War was even more destructive, lasting until 2005 and leading eventually to the independence of South Sudan in 2011. Image: Flag of South Sudan.