The Chiers is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in Luxembourg

Luxembourg

Luxembourg , officially the Grand Duchy of Luxembourg , is a landlocked country in western Europe, bordered by Belgium, France, and Germany. It has two principal regions: the Oesling in the North as part of the Ardennes massif, and the Gutland in the south...

, Belgium

Belgium

Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

 and France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

. It is a right tributary to the river Meuse

Meuse River

The Maas or Meuse is a major European river, rising in France and flowing through Belgium and the Netherlands before draining into the North Sea...

. Its total length is about 130 km.

The source of the Chiers is near Differdange

Differdange

Differdange is a commune with city status in south-western Luxembourg. Differdange is an industrial city that was home to much of Luxembourg's steel production, and lies near the borders with Belgium and France...

, in Luxembourg

Luxembourg

Luxembourg , officially the Grand Duchy of Luxembourg , is a landlocked country in western Europe, bordered by Belgium, France, and Germany. It has two principal regions: the Oesling in the North as part of the Ardennes massif, and the Gutland in the south...

. The Chiers flows roughly in western direction.

It crosses the border with France, flows through Longwy

Longwy

Longwy is a commune in the Meurthe-et-Moselle department in north-eastern France.The inhabitants are known as Longoviciens.-Economy:Longwy has historically been an industrial center of the Lorraine iron mining district. The town is known for its artistic glazed pottery.-History:Longwy initially...

 and Longuyon

Longuyon

Longuyon is a commune in the Meurthe-et-Moselle department in north-eastern France.The apartment blocks on the southwestern edge of town, still called "La Cité Canadienne", were home to Royal Canadian Air Force staff and their families in the 1950s and 1960s, when the RCAF had an airbase at nearby...

 (Meurthe-et-Moselle

Meurthe-et-Moselle

Meurthe-et-Moselle is a department in the Lorraine region of France, named after the Meurthe and Moselle rivers.- History :Meurthe-et-Moselle was created in 1871 at the end of the Franco-Prussian War from the parts of the former departments of Moselle and Meurthe which remained French...

 département) and forms the border with Belgium for a few km near Torgny (municipality of Rouvroy

Rouvroy, Belgium

Rouvroy is a Walloon municipality of Belgium located in the province of Luxembourg.On 1 January 2007 the municipality, which covers 27.68 km², had 2,007 inhabitants, giving a population density of 72.5 inhabitants per km²....

). It continues through France, along Montmédy

Montmédy

Montmédy is a commune in the Meuse department in Lorraine in north-eastern France.-Citadel of Montmédy:In 1221 the first castle of Montmédy was built on top of a hill by the Count of Chiny. Montmédy became soon the capital of his territory - later it belonged to Luxembourg, Burgundy, Austria and...

 (Meuse

Meuse

Meuse is a department in northeast France, named after the River Meuse.-History:Meuse is one of the original 83 departments created during the French Revolution on March 4, 1790...

 département) and Carignan

Carignan, Ardennes

Carignan is a commune in the Ardennes department in northern France. It is the seat of a canton.-History:Carignan was, under the name Epoissium, Eposium, Epusum or Ivosium, a military settlement of the Romans. Gaugericus, bishop of Cambrai, was born in Eposium around 550. As Yvois, it was part of...

 (Ardennes

Ardennes (département)

Ardennes is a department in the northeast part of France named after the Ardennes area.- History :The department is one of the original 83 departments created during the French Revolution on 4 March 1790. It was named after the Ardennes hills, which are located in northeast France, southern...

 département).

The Chiers flows into the river Meuse

Meuse River

The Maas or Meuse is a major European river, rising in France and flowing through Belgium and the Netherlands before draining into the North Sea...

 in Bazeilles

Bazeilles

Bazeilles is a commune in the Ardennes department in northern France.It lies near Sedan.-History:During the 1870 Franco-Prussian war, Bazeilles was the site of the Battle of Bazeilles, one of the first occasions of modern urban warfare.-Population:...

, near Sedan

Sedan, France

Sedan is a commune in France, a sub-prefecture of the Ardennes department in northern France.-Geography:The historic centre is built on a peninsula formed by an arc of the Meuse River. It is around from the Belgian border.-History:...

.

Its main tributaries are the Loison and the Othain

Othain

The Othain is a long river in the Meurthe-et-Moselle and Meuse départements, northeastern France. Its source is at Gondrecourt-Aix, in the Woëvre. It flows generally northwest...

.