in 1974, during the First Chadian Civil War, rebels led by Toubou nationalist Hissène Habré captured French archaeologist Françoise Claustre, Marc Combe (also French), an assistant to Mrs. Claustre's husband, and Christoph Staewen, a German physician. Stray bullets killed Staewen's wife. The trio were captured near Bardaï in the desert of the Tibesti Region.