Chiers (French, in German: Korn) is a river in Luxembourg, Belgium and France. It is a tributary to the river Meuse. The source of the Chiers is near Differdange , in Luxembourg. The Chiers flows roughly in western direction. It crosses the border with France, flows through Longwy and Longuyon (Meurthe-et-Moselle département) and forms the border with Belgium for a few km near Torgny (municipality of Rouvroy). It continues through France, along Montmédy (Meuse département) and Carignan (Ardennes département). The Chiers flows into the river Meuse in Bazeilles , near Sedan. Its total length is 112 km.