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.