Thiennes

The Canal de la Nieppe was part of the Hazebrouck Canals (French: Canaux d'Hazebrouck). It connected to the River Lys at Thiennes with a second connection to the River Lys at Merville. It was 23 km with 4 locks. The other canals composing the Hazebrouck canals are the Canal de Préaven, Canal de la Bourre, Canal d'Hazebrouck.

The Arras–Dunkirk railway is a French railway which runs from Arras to Dunkirk. Electrified double track it is 113 kilometres (70 miles) long.

Steenbecque (Dutch: Steenbeke or Steenbeeke) is a commune in the Nord department in northern France.

Isbergues (French pronunciation: ​[isbɛʁɡ]; West Flemish: Iberge) is a commune in the Pas-de-Calais department in the Hauts-de-France region of France.

Boëseghem (French pronunciation: ​[boɛz(ə)ɡɛm]) is a commune in the Nord department in northern France.

Guarbecque (West Flemish: Gaverbeke) is a commune in the Pas-de-Calais department in the Hauts-de-France region of France.

The Canal d'Aire is a French canal connecting the Canal de Neufossé in Aire-sur-la-Lys to the Canal de la Deûle in Bauvin. It is a segment of the Canal Dunkerque-Escaut.

Sercus is a commune in the Nord department in northern France.

Ham-en-Artois is a commune in the Pas-de-Calais department in the Hauts-de-France region of France.

Morbecque (Dutch: Moerbeke) is a commune in the Nord department in northern France.

The Laquette is a river of northern France, right tributary of the Lys. It is 23 km (14 mi) long. It flows into the Lys in Aire-sur-la-Lys.

Aire-sur-la-Lys (French pronunciation: ​[ɛʁ syʁ la lis], literally Aire on the Lys; West Flemish: Ariën-aan-de-Leie) is a commune in the Pas-de-Calais department in northern France.