Lake Chad At its largest extent the river Mayo Kébbi represented the outlet of the paleolake Mega-Chad, connecting it to the Niger River and the Atlantic. The presence of African manatees in the inflows of Lake Chad is an evidence of that history. Romans reached the lake in the first century of their empire. Indeed, during the time of Augustus lake Chad was still a huge lake and two Roman expeditions were done in order to reach it: Septimius Flaccus and Julius Maternus reached the "lake of hippopotamus" (as the lake was called by Claudius Ptolemaeus). They moved from coastal Tripolitania and
Geography of Niger longest border is with Nigeria to the south, at 1,608 km. This is followed by Chad to the east (1,196 km), Algeria to the north-northwest (951 km), and Mali to the west (838 km). Niger also has short borders in its far southwest frontier (Burkina Faso at 622 km and Benin at 277 km) and to the north-northeast (Libya at 342 km). Geography of Niger Niger is a landlocked nation in West Africa located along the border between the Sahara and Sub-Saharan regions. Its geographic coordinates are longitude 16°N and latitude 8°E. Its area is 1.267 million square kilometers, of