as predominantly non-Arabized and animist or Christian. These divisions had been further emphasized by the British policy of ruling the north and south under separate administrations. From 1924, it was illegal for people living north of the 10th parallel to go further south and for people south of the 8th parallel to go further north. The law was ostensibly enacted to prevent the spread of malaria and other tropical diseases that had ravaged British troops, as well as to facilitate spreading Christianity among the predominantly animist population while stopping the Arabic and Islamic influence from advancing south. The result was increased isolation between the already distinct north and south and arguably laid the seeds of conflict in the years to come.
The resulting conflict lasted from 1955 to 1972. The 1955 war began when Southern army officers mutinied and then formed the Anya-Nya guerilla movement. A few years later the first Sudanese military regime took power under Major-General Abboud. Military regimes continued into 1969 when General Gaafar Nimeiry led a successful coup.
In 1972, a cessation of the north-south conflict was agreed upon under the terms of the Addis Ababa Agreement, following talks which were sponsored by the World Council of Churches. This led to a ten-year hiatus in the national conflict with the south enjoying self-government through the formation of the Southern Sudan Autonomous Region.
In 1983, the civil war was reignited following President Nimeiry's decision to circumvent the Addis Ababa Agreement. Nimeiry attempted to create a federated Sudan including states in southern Sudan, which violated the Addis Ababa Agreement that had granted the south considerable autonomy. He appointed a committee to undertake "a substantial review of the Addis Ababa Agreement, especially in the areas of security arrangements, border trade, language, culture and religion". Mansour Khalid, a former foreign minister, wrote:
