Although the conflict in Darfur commands much of the international attention regarding conflict in Sudan, armed conflict in Sudan officially dates from 1983. The beginning of hostilities in 1983 was strongly influenced by colonial policy. Until 1946, the north of Sudan was administered by Egypt and the south was administered by Britain. This led to a divide between an Arabic/Muslim north and an African/Christian south. There have been numerous armed conflicts between armed forces in the South and the Sudanese government in the North, and the increase in oil revenues in the late 1990s of oil did little to calm the conflict. Hostilities in Sudan (excluding those in Darfur) have claimed approximately 2 million lives, and there are an estimated between 4 million Internally Displaced Persons in the north of Sudan that have taken refugee from fighting in the south (Uppsala Conflict Database and Armed Conflict Database respectively). Around Khartoum in particular, there are large refugee camps housing tens of thousands of people.