
A referendum took place in Southern Sudan from 9 to 15 January 2011, on whether the region should remain a part of Sudan or become independent. The referendum was one of the consequences of the 2005 Naivasha Agreement between the Khartoum central government and the Sudan People's Liberation Army/Movement (SPLA/M).

United Nations Flight 544 was a civilian helicopter operated by Nizhnevartovskavia that on 21 December 2012 was shot down by the South Sudanese army (SPLA) near Likuangole, South Sudan, killing all four people on board.

On 22 August 2020, a South West Aviation An-26 turboprop aircraft crashed upon taking off from Juba Airport in Juba, South Sudan, for a domestic cargo charter flight to Aweil and to Wau, South Sudan.

The Adar oilfield, also known as the Adar Yale, Adar Yeil or Adaril field, is an oilfield situated in the Mabaan in South Sudan estimated to contain about 276 million barrels (43,900,000 m3) of oil. The Chevron Corporation discovered the Adar Yale field in 1981, shortly before the start of the Second Sudanese Civil War (1983–2005). Soon after Chevron had suspended operations in 1984, Sudanese government troops began attacking civilian settlements in the area, burning the houses and driving the people away, and in the late 1990s, Nuer militias from Nasir helped the army in clearing away the people to make way for the roads and infrastructure of the oilfield.

The Anglo-Egyptian Sudan was a condominium of the United Kingdom and Egypt in the eastern Sudan region of northern Africa between 1899 and 1956, but in practice the structure of the condominium ensured full British control over the Sudan with Egypt having local influence instead. It attained independence as the Republic of the Sudan, which since 2011 has been split into Sudan and South Sudan.
The Anyanya were a southern Sudanese separatist rebel army formed during the First Sudanese Civil War (1955–1972). A separate movement that rose during the Second Sudanese Civil War were, in turn, called Anyanya II. Anyanya means "snake venom" in the Madi language.

The Azania Liberation Front (ALF) was an armed rebel faction established in 1965, during the First Sudanese Civil War, by exiled members of the Sudan African National Union (SANU). It was a part of the original South Sudan Liberation Movement, the first Sudanese secessionist movement. Its name was taken from the Greek Azania, the Greek designation for the lands of East Africa south of Nubia.

Block 5A is an oil concession in South Sudan. After oil field development began during the Second Sudanese Civil War, Block 5A was the scene of extensive fighting as rival militias struggled for control. Out of an original population of 240,000, an estimated 12,000 were killed or died of starvation and 160,000 were displaced by force. Production started in 2006. There is evidence that the environmentally sensitive marshlands beside the Nile are becoming polluted. European companies have been accused of complicity in clearance of the population from the oil field.

Doleib Hill was a mission station established by the American Inland Mission in southern Sudan, located approximately 10 miles (16 km) south of the city of Malakal, on the northern bank of the Sobat River, then in the former Upper Nile province of Sudan, the present day Upper Nile state of South Sudan.

The First Sudanese Civil War was a conflict from 1955 to 1972 between the northern part of Sudan and the southern Sudan region that demanded representation and more regional autonomy. Half a million people died over the 17 years and the war was divided into four major stages: initial guerrilla warfare, the creation of the Anyanya insurgency, political strife within the government and establishment of the South Sudan Liberation Movement.

The Greek diaspora in what became the Republic of South Sudan in 2011 is tiny in numbers – estimated at around 90 – but historically played an important role and has some prominent members, especially First Lady Mary Ayen Mayardit.

The Jonglei Canal was a canal project Started but never completed to divert water through the vast Sudd wetlands of South Sudan so as to deliver more water downstream to Sudan and Egypt for use in agriculture.

The Lado Enclave was an exclave of the Congo Free State and later of Belgian Congo that existed from 1894 until 1910, situated on the west bank of the Upper Nile in what is now South Sudan and northwest Uganda.

Liffi was a military station in Sudan, named after a nearby hill, and the surrounding region. It was the location of several clashes between Egyptian forces and Mahdists in the early 1880s. In 1894 the Belgians temporarily established a base there.

This article lists the heads of state of South Sudan since the establishment of the Southern Sudan Autonomous Region within Sudan in 1972.

The Pagak offensive was a major military operation by the South Sudanese government during the South Sudanese Civil War with the aim of capturing the strategic town of Pagak and the wider Maiwut County from Riek Machar's SPLM-IO rebels. Since the civil war's beginning, Pagak had served as headquarters and stronghold for the rebels, and its loss was believed to possibly greatly weaken the insurgency. A large part of the government forces that took part in the offensive are members of the SPLM-IO, a break-away group from Machar's movement that is loyal to First Vice President Taban Deng Gai. Though pro-government forces managed to capture Pagak on 6 August, their attempts to secure the surrounding areas proved unsuccessful. As result, the SPLA-held corridor between Mathiang and Pagak remained unsafe.

The Second Sudanese Civil War was a conflict from 1983 to 2005 between the central Sudanese government and the Sudan People's Liberation Army. It was largely a continuation of the First Sudanese Civil War of 1955 to 1972. Although it originated in southern Sudan, the civil war spread to the Nuba mountains and the Blue Nile. It lasted for 22 years and is one of the longest civil wars on record. The war resulted in the independence of South Sudan six years after the war ended.

The Shilluk Kingdom was located along the banks of the White Nile river in modern South Sudan. Its capital and royal residence was in the town of Fashoda. According to their folk history and neighboring accounts, the kingdom was founded during the mid-fifteenth century CE by its first ruler, the demigod Nyikang. During the nineteenth century, the Shilluk were affected by military assaults from the Ottoman Empire and later British colonization in Anglo-Egyptian Sudan. The Shilluk king is currently not an independent political leader, but a traditional chieftain within the governments of South Sudan and Sudan. The current Shilluk king is His Majesty Reth Kwongo Dak Padiet who ascended to the throne in 1993.

The South Sudan Liberation Movement (SSLM) is an armed group that operates in the Upper Nile Region of South Sudan. The group's creation was announced in November 1999 by people of the Nuer ethnicity who were in both the rebel Sudan People's Liberation Army (SPLA) and the government-allied South Sudan Defence Forces (SSDF) gathered in Waat. The SSLM was declared to be unaligned in the Second Sudanese Civil War, then entering its sixteenth year. The name "South Sudan Liberation Movement" was decided upon the next year, borrowing from the earlier Southern Sudan Liberation Movement, which existed in the 1980s.

The South Sudanese Civil War was a conflict in South Sudan between forces of the government and opposition forces. In December 2013, President Kiir accused his former deputy Riek Machar and ten others of attempting a coup d'état. Machar denied trying to start a coup and fled to lead the SPLM – in opposition (SPLM-IO). Fighting broke out between the Sudan People's Liberation Movement (SPLM) and SPLM-IO, igniting the civil war. Ugandan troops were deployed to fight alongside the South Sudanese government. The United Nations has peacekeepers in the country as part of the United Nations Mission in South Sudan (UNMISS).

The Southern Sudan Autonomous Region was an autonomous region that existed in Southern Sudan between 1972 and 1983. It was established on 28 February 1972 by the Addis Ababa Agreement which ended the First Sudanese Civil War. The region was abolished on 5 June 1983 by the administration of Sudanese President Gaafar Nimeiry. Revocation of southern autonomy was one of the causes of the Second Sudanese Civil War which would continue until January 2005, when southern autonomy was restored.

Southern Sudan was an autonomous region consisting of the ten southern states of Sudan between its formation in July 2005 and independence as the Republic of South Sudan in July 2011. The autonomous government was initially established in Rumbek and later moved to Juba. It was bordered by Ethiopia to the east; Kenya, Uganda, and the Democratic Republic of the Congo to the south; and the Central African Republic to the west. To the north lies the predominantly Arab and Muslim region directly under the control of the central government. The region's autonomous status was a condition of a peace agreement between the Sudan People's Liberation Army/Movement (SPLA/M) and the Government of Sudan represented by the National Congress Party ending the Second Sudanese Civil War. The conflict was Africa's longest running civil war.

On 16 August 1986 a Fokker F-27 Friendship 400M was performing a scheduled domestic passenger flight from Malakal to Khartoum in Sudan, when it was shot down by the SPLA militants. All 60 people on board the aircraft were killed. As of May 2014, the shootdown remains the deadliest incident involving a Fokker F-27 and the deadliest aviation incident in South Sudan.

The Sudanese conflict in South Kordofan and Blue Nile is an armed conflict in the Sudanese southern states of South Kordofan and Blue Nile between the Sudanese Army (SAF) and Sudan People's Liberation Movement-North (SPLM-N), a northern affiliate of the Sudan People's Liberation Movement (SPLM) in South Sudan. After some years of relative calm following the 2005 agreement which ended the second Sudanese civil war between the Sudanese government and SPLM rebels, fighting broke out again in the lead-up to South Sudan independence on 9 July 2011, starting in South Kordofan on 5 June and spreading to the neighboring Blue Nile state in September. SPLM-N, splitting from newly independent SPLM, took up arms against the inclusion of the two southern states in Sudan with no popular consultation and against the lack of democratic elections. The conflict is intertwined with the War in Darfur, since in November 2011 SPLM-N established a loose alliance with Darfuri rebels, called Sudan Revolutionary Front (SRF).

The vulture and the little girl, also known as "The Struggling Girl", is a famous photograph by Kevin Carter which first appeared in The New York Times on 26 March 1993. It is a photograph of a frail famine-stricken boy, initially believed to be a girl, who had collapsed in the foreground with a hooded vulture eyeing him from nearby. The child was reported to be attempting to reach a United Nations feeding center about a half mile away in Ayod, Sudan, in March 1993, and to have survived the incident. The picture won the Pulitzer Prize for Feature Photography award in 1994. Carter took his own life four months after winning the prize.

United Nations Security Council Resolution 1999 was adopted without a vote on 13 July 2011 after examining the application of the Republic of South Sudan for membership into the United Nations. The Council recommended to the General Assembly that South Sudan be admitted.

Armed clashes took in Wau State from late June 2016 to January 2019, between the Dinka-dominated Sudan People's Liberation Army (SPLA) and local opposition forces, consisting of tribal Fertit militias as well as fighters claiming allegiance to Riek Machar. It is unclear to what extent these rebels are actually part of the SPLM-IO or acting independently while using the SPLM-IO's name. The clashes resulted in the arrest of the state's governor, Elias Waya Nyipuoc, widespread death and destruction in the state capital, Wau town, and the displacement of up to 150,000 people.