Foreign relations of Niger about 19,400 km² in northern Niger. There have been several decades of unresolved discussions regarding the delimitation of international boundaries in the vicinity of Lake Chad between Niger, Nigeria, Chad, and Cameroon. The lack of firm borders, as well as the receding of the lake in the 20th century led to border incidents between Cameroon and Chad in the past. An agreement has been completed and awaits ratification by Cameroon, Chad, Niger, and Nigeria. Niger has an ongoing conflict with Benin over Lété Island, an island in the River Niger approx. 16 kilometres long and 4 kilometres wide, located around
Rail transport in Chad N'Djamena to Moundou and Koutéré on the Cameroon border (528 km), and one from the capital to the border with Sudan (836 km) via Abéché and Adré. The lines are to be built to standard gauge and for 120 km/h running, and equipment for the line will be sourced in China. Rail transport in Chad Up to 2012 Chad had no rail system. Two lines are planned to Sudan and Cameroon from the capital with construction expected to start in February 2016 and be complete in 4 years. A 1905 book describes the history of a German railroad syndicate's exploration