United Nations, March 23 -- With Chad at a crossroads of life-threatening challenges ranging from violence to drought, the United Nations and its humanitarian partners appealed for $476 million to support the most vulnerable of 4.3 million people relying on aid in the African country.

Violence, displacement and the collapse of basic services have led hundreds of thousands of families, especially the southern half of the country, to be dependent on aid.

Humanitarian organisations are working with the Government of Chad to respond to the crisis and gain access to people in need, but insecurity and financial constraints remain major challenges.

Bordered by Libya, Sudan, the Central African Republic, Cameroon, Nigeria and Niger - and despit...