The exploration of Tibesti, Erdi, Borkou, and Ennedi in 1912-1917 : a mission…
"The exploration of Tibesti, Erdi, Borkou, and Ennedi in 1912-1917: a mission…" by Lieut.-Colonel Jean Tilho is a geographical expedition report and lecture written in the early 20th century. It documents a French mission in Central Saharan Africa that combined scientific surveying with military operations. The central question is whether Lake Chad ever connected to the Nile via the Bahr el Ghazal depression, set against detailed accounts of routes, oases, climate, terrain,
and local peoples during Senoussist unrest and wartime pressures. Expect systematic observation, maps, and logistical realities rather than a narrative travelogue. The opening of this work lays out the mission’s aim, Tilho’s background and route into the Lake Chad region, and the 1912–1913 campaign that seized key Senoussist strongholds at Ain Galakka, Faya, Gouro, and Ounianga. It explains why taking Borkou mattered strategically during the broader Turco‑German–Senoussist push, then sketches four demanding years of holding the oasis network. Tilho offers vivid, practical portraits of Kanem, Borkou, and Ounianga—their water, winds, heat, soils, crops (chiefly dates), pests, and trade in salt and dates—before pushing east to the Tekro and Sarra wells on the Koufra route and recounting a perilous return guided only by compass. He advances through Dimi into the little‑known plateaux of Erdi, mapping water points and altitudes, and then crosses a broad depression to Ennedi, where measurements lead him to conclude the Chad basin is a closed system, not linked to the Nile. The narrative then surveys Ennedi’s terraced sandstone plateaux, seasonal wadis, natural cisterns, rich pastures, sparse, raiding-prone tribes, and the spectacular valleys of Archeï, followed by reconnaissance west into Mortcha’s wadis and the ancient lake zones. With the Great War’s “holy war” agitation inflaming raids, he describes French counter‑raids and then turns to Tibesti, outlining the plan, hazards, and a striking ascent of Emi Koussi’s vast crater before returning to regroup for further operations. (This is an automatically generated summary.)
