Question: When did the war in south sudan start?

Disambiguated questions and answers:
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question: When did the civil war in south sudan start?
short_answers: 15 December 2013

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question: When did the second sudanese civil war in southern sudan start?
short_answers: 5 June 1983

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question: When did the first sudanese civil war in southern sudan start?
short_answers: 18 August 1955

Long answers:
knowledge: content: The First Sudanese Civil War (also known as the Anyanya Rebellion or Anyanya I, after the name of the rebels, a term in the Madi language which means 'snake venom')[19] 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.
wikipage: First Sudanese Civil War

content: 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.
wikipage: Second Sudanese Civil War

content: Peace talks between the southern rebels and the government made substantial progress in 2003 and early 2004, although skirmishes in parts of the south continued. A Comprehensive Peace Agreement was signed on 9 January 2005 in Nairobi. 
wikipage: Second Sudanese Civil War Later operations and peace agreement of 2005

content: The South Sudanese Civil War was a multi-sided civil war 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.[52][53] Machar denied trying to start a coup and fled to lead the SPLM – in opposition (SPLM-IO).[54] 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.[55] The United Nations has peacekeepers in the country as part of the United Nations Mission in South Sudan (UNMISS).
wikipage: South Sudanese Civil War
long_answer: The first Sudanese Civil War in southern Sudan started on 18 August 1955, between the northern part of Sudan and the southern Sudan region that demanded representation and more regional autonomy.  The second Sudanese civil war in southern Sudan was a continuation of the first war and started on 5 June 1983. A peace agreement was reached 22 years later, on  9 January 2005 in Nairobi, making it one of the longest civil wars on record. The South Sundanese Civil War started on 15 December 2013, after President Kiir accused his former deputy Riek Machar and ten others of attempting a  coup d'état.