Déby faces armed opposition from groups who are deeply divided by leadership clashes but united in their intention to overthrow him. These forces stormed the capital on 13 April 2006, but were ultimately repelled. Chad's greatest foreign influence is France, which maintains 1,000 soldiers in the country. Déby relies on the French to help repel the rebels, and France gives the Chadian army logistical and intelligence support for fear of a complete collapse of regional stability. Nevertheless, Franco-Chadian relations were soured by the granting of oil drilling rights to the American Exxon company in 1999.