
A largely semi-desert country, Chad is rich in gold and uranium and stands to benefit from its recently-acquired status as an oil-exporting state.
However, Africa's fifth-largest nation suffers from inadequate infrastructure and internal conflict. Poverty is rife, and health and social conditions compare unfavourably with those elsewhere in the region.
Chad's post-independence history has been marked by instability and violence stemming mostly from tension between the mainly Arab-Muslim north and the predominantly Christian and animist south.
In 1969 Muslim dissatisfaction with the first president, Ngarta Tombalbaye – a Christian southerner – developed into a guerrilla war. This, combined with a severe drought, undermined his rule and in 1975 President Tombalbaye was killed in a coup led by another southerner, Felix Malloum.
Mr Malloum, too, failed to end the war, and in 1979 he was replaced by a Libyan-backed northerner, Goukouki Oueddei. But the fighting continued, this time with a former defence minister, Hissen Habre, on the opposite side.
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At a glance

Politics: Crises on several fronts: President Deby, in power since 1990, faces an armed rebellion by several groups and incursions from neighbouring Sudan. He survived a coup attempt in 2006
Humanitarian issues: 140,000 people are internal refugees; 200,000 refugees are from Sudan
Economy: Chad is enjoying an oil boom. Changes to rules governing how revenues can be spent have been controversial. Chad ranks as the world's most corrupt state
International: Chad cut ties with Sudan in 2006, accusing it of supporting rebels, but since 2009 efforts have been made to resolve the countries' differences. Chad hosts large numbers of refugees from Central African Republic and Sudan's Darfur
In 1982, with French help, Mr Habre captured the capital, N'Djamena, and Mr Oueddei escaped to the north, where he formed a rival government. The standoff ended in 1990, when Mr Habre was toppled by the Libyan-backed Idriss Deby.
By the mid-1990s the situation had stabilised and in 1996 Mr Deby was confirmed president in Chad's first election.
In 1998 an armed insurgency began in the north, led by President Deby's former defence chief, Youssouf Togoimi. A Libyan-brokered peace deal in 2002 failed to put an end to the fighting.
From 2003 unrest in neighbouring Sudan's Darfur region spilled across the border, along with hundreds of thousands of Sudanese refugees. They have been joined by thousands of Chadians who are fleeing rebel fighting as well as violence between ethnic Arab and ethnic African Chadians.
Chad and Sudan accuse each other of backing and harbouring rebels, and the dispute led to severing of relations in 2006. However, since then, progress has been made towards normalising ties, with the two countries' presidents meeting for the first time in six years in 2010.
Chad became an oil-producing nation in 2003 with the completion of a $4bn pipeline linking its oilfields to terminals on the Atlantic coast. The government has moved to relax a law controlling the use of oil money, which the World Bank had made a condition of its $39m loan.






Thousands now camp amid the ruins of Somalia's capital, Mogadishu
Extended drought is causing a severe food crisis in the Horn of Africa, which includes Kenya, Ethiopia, Djibouti and Somalia. Weather conditions over the Pacific means the rains have failed for two seasons and are unlikely to return until September.
Food shortages are affecting up to 12 million people. The UN has not declared a famine but large areas of the region are now classified as in crisis or emergency, with malnutrition affecting up to 35-40% of children under five.
The humanitarian problem is made worse by ongoing conflicts, which means that until July militant groups had only allowed aid organisations limited access to large parts of southern Somalia and eastern Ethiopia.
Since the beginning of 2011, around 15,000 Somalis each month have fled into refugee camps in Kenya and Ethiopia looking for food and water. The refugee camp at Dadaab, in Kenya, has been overwhelmed by 370,000 people.
Farmers unable to meet their basic food costs are abandoning their herds. High cereal and fuel prices had already forced them to sell many animals before the drought and their smaller herds are now unprofitable or dying.
The refugee problem may have been preventable. However, violent conflict in the region has deterred international investment in long-term development programmes, which may have reduced the effects of the drought.
Development aid would focus on reducing deforestation, topsoil erosion and overgrazing and improving water conservation. New roads and infrastructure for markets would help farmers increase their profits.
The result of climate conditions, conflict and lack of investment is that 6.7 million people in Kenya and Ethiopia are currently existing on food rations, and relief agencies estimate 2.6 million in Somalia will need assistance a new emergency operation.
