Second Sudanese Civil War

On 30 July 2005, SPLM leader John Garang died in a helicopter crash while returning from Uganda, only weeks after becoming Sudan’s first vice president under the peace agreement. His death shocked both north and south, triggered unrest, and raised immediate fears for the survival of the new settlement. Garang had been the central figure of the southern rebellion since 1983 and the chief architect of the SPLM/A’s political vision. Although the peace process survived under new leadership, his sudden death profoundly altered the postwar transition and the future political balance of Sudan and South Sudan.

On 9 January 2005, the Government of Sudan and the SPLM/A signed the Comprehensive Peace Agreement in Naivasha, Kenya, formally ending the Second Sudanese Civil War after more than two decades. The accord created a power-sharing government, provided for wealth-sharing including oil revenues, established security arrangements, restored southern autonomy, and set a timetable for a referendum on independence. While implementation would remain difficult and violence persisted in some areas, the CPA was the decisive political settlement of the war and laid the institutional road toward South Sudan’s eventual statehood.

By 31 December 2004, the remaining protocols of the north-south peace process had been completed, including arrangements on power sharing, wealth sharing, and security. These late-stage agreements were crucial because they converted the broad political principles of Machakos into a workable blueprint for ending Africa’s longest-running civil war. They also reflected sustained pressure from regional mediators and international backers. The completion of the final chapters signaled that the parties had moved from exploratory talks to an enforceable settlement, making formal signature of the Comprehensive Peace Agreement imminent.

On 20 July 2002, the government of Sudan and the SPLM/A signed the Machakos Protocol in Kenya under the mediation of the Intergovernmental Authority on Development. The protocol was a breakthrough because it set out the core political bargain for ending the war: the south would receive an interim period of self-government followed by a referendum on self-determination. It also addressed the relationship between religion and the state, one of the conflict’s foundational disputes. Machakos did not end the fighting immediately, but it established the framework for the final peace settlement.

On 19 January 2002, the Sudanese government and the SPLM/Nuba concluded the Nuba Mountains Cease-Fire Agreement at Bürgenstock, Switzerland. Though limited geographically, the accord was a major milestone because it reduced fighting in one of the war’s hardest-hit regions and enabled international monitoring and humanitarian access. Just as importantly, it built confidence that negotiated arrangements with verification mechanisms were possible. The cease-fire is widely seen as a crucial precursor to the broader peace process that gathered speed later in 2002 and eventually produced a comprehensive settlement.

Beginning on 27 February 1999, chiefs, church leaders, women, and community representatives gathered at Wunlit for a major Dinka-Nuer peace conference. Although local rather than national in form, the process mattered strategically because it sought to reduce internecine violence that had crippled southern resistance since the 1991 split. The conference helped reopen migration routes, encourage returns, and create momentum for broader reconciliation among southern communities. Wunlit showed that local peacemaking could shape the wider war by rebuilding social ties that national military leaders had shattered.

In 1998, southern Sudan suffered another catastrophic famine, especially in Bahr el Ghazal, after renewed fighting, displacement, market collapse, and restrictions on humanitarian access. Human rights investigators and relief agencies argued that the famine was not simply a natural disaster but a product of war, with military actions and denial of aid intensifying civilian vulnerability. Images of starving children drew global attention and renewed pressure on the combatants. The crisis became one of the clearest demonstrations that the conflict was being fought not only with bullets, but also through the destruction of livelihoods.

On 21 April 1997, the Sudanese government signed the Khartoum Peace Agreement with several southern factions, including groups outside Garang’s main SPLA. The accord was significant because it recognized, at least on paper, a future referendum on southern self-determination. Yet it failed to end the war because the largest rebel movement remained outside the deal, and many signatories lacked the power to impose peace on the ground. The agreement therefore illustrated both the growing centrality of self-determination and Khartoum’s strategy of negotiating with splinter groups to isolate the main insurgency.

On 15 November 1991, forces aligned with the SPLA-Nasir faction attacked Bor and surrounding Dinka communities, killing large numbers of civilians in one of the war’s most notorious atrocities. The massacre followed the Nasir split and intensified ethnic polarization within the southern resistance. Beyond the immediate deaths, looting, displacement, and destruction of cattle and crops created long-term social and economic damage. The event became a lasting symbol of how internal southern rivalries, not only the north-south front line, dramatically worsened civilian suffering during the war.

On 28 August 1991, senior SPLA figures led by Riek Machar and Lam Akol announced a break with John Garang in what became known as the Nasir split. The split exposed deep tensions over leadership, ethnicity, and political goals, including whether the rebellion should seek a reformed Sudan or southern self-determination. Instead of strengthening the anti-government struggle, the division triggered internecine violence, weakened the southern movement militarily, and gave Khartoum opportunities to exploit rivalries. The fragmentation would shape the rest of the war and leave enduring scars in southern society.

On 30 June 1989, Brigadier Omar al-Bashir took power in a coup backed by Islamist allies, overthrowing the elected government of Sadiq al-Mahdi. The new regime hardened the war effort, centralized authority, and framed the conflict increasingly in ideological and religious terms. Hopes for a negotiated end receded as the government pursued military offensives and mobilized militias. Bashir’s takeover marked a decisive turning point, because the war would now be prosecuted by a more authoritarian state willing to absorb international isolation in order to pursue battlefield advantage.

In April 1989, the United Nations and partner agencies launched Operation Lifeline Sudan, an unprecedented arrangement to deliver humanitarian assistance across battle lines in both government- and rebel-held territory. Created in response to famine and mass displacement, it established a framework for negotiated access to civilians trapped by war. Although heavily constrained by politics, insecurity, and manipulation by armed actors, Operation Lifeline Sudan became one of the most important humanitarian interventions of the conflict and a landmark model for aid operations in active war zones.

By 1988, fighting, displacement, scorched-earth tactics, and the breakdown of agriculture in southern Sudan had combined to produce a devastating famine in Bahr el Ghazal. The disaster exposed how starvation had become intertwined with military strategy and state neglect. Large numbers of civilians were cut off from markets, livestock, and humanitarian aid, and the suffering helped draw wider international attention to the war’s human cost. The famine also foreshadowed later crises in which access to food and relief would remain central battlegrounds in the conflict.

In September 1983, President Nimeiry imposed Islamic sharia-based legislation across Sudan in what became known as the September Laws. The move overturned the fragile political balance established after the first civil war and was widely seen in the south as proof that Khartoum would not preserve pluralism or regional autonomy. Combined with the earlier dismantling of the Southern Sudan Autonomous Region, the legal shift turned a military rebellion into a broader political and ideological war over religion, identity, and state power.

On 16 May 1983, southern troops of the Sudanese army’s Battalion 105 mutinied at Bor after growing anger over redeployment orders, unpaid salaries, and the erosion of the south’s autonomy under President Gaafar Nimeiry. The clash quickly became the symbolic opening of the Second Sudanese Civil War. John Garang soon emerged as the central rebel leader, and the mutiny helped catalyze the formation of the Sudan People’s Liberation Army/Movement (SPLA/M), transforming scattered southern resistance into a major insurgency against Khartoum.