Progressive Party (PPT), based in the southern half of the colony. Chad was granted independence on August 11, 1960 with the PPT's leader, François Tombalbaye, as its first president.
Two years later, Tombalbaye banned opposition parties and established a one-party system. Tombalbaye's autocratic rule and insensitive mismanagement exacerbated interethnic tensions. In 1965 Muslims began a civil war. Tombalbaye was overthrown and killed in 1975, but the insurgency continued. In 1979 the rebel factions conquered the capital, and all central authority in the country collapsed. Armed factions, many from the north's rebellion, contended for power.
The disintegration of Chad caused the collapse of France's position in the country. Libya moved to fill the power vacuum and became involved in Chad's civil war. Libya's adventure ended in disaster in 1987; the French-supported president, Hissène Habré, evoked a united response from Chadians of a kind never seen before and forced the Libyan army off Chadian soil.
Habré consolidated his dictatorship through a power system that relied on corruption and violence; an estimated 40,000 people were killed under his rule. The president favoured his own Daza ethnic group and discriminated against his former allies, the Zaghawa. His general, Idriss Déby, overthrew him in 1990.
Déby attempted to reconcile the rebel groups and reintroduced multiparty politics. Chadians approved a new constitution by referendum, and in 1996, Déby easily won a competitive presidential election. He won a second term five years later. Oil exploitation began in Chad in 2003, bringing with it hopes that Chad would at last have some chances of peace and prosperity. Instead, internal dissent worsened, and a new civil war broke out. Déby unilaterally modified the constitution to remove the two-term limit on the presidency; this caused an uproar among the civil society and opposition parties. In 2006 Déby won a third
