Dyle (river) in the context of "Battle of Dunkirk"

The Senne (French, pronounced [sɛn] ) or Zenne (Dutch, pronounced [ˈzɛnə]) is a small river that flows through Brussels, Belgium. Its source is in the village of Naast near the municipality of Soignies. It is an indirect tributary of the Scheldt, through the Dyle and the Rupel. It joins the Dyle at Zennegat in Battel, north of the municipality of Mechelen, only a few hundred metres before the Dyle itself joins the Rupel.

In total, the Senne is 103 km (64 mi) long. The Woluwe and the Maelbeek are some of its tributaries.

Mechelen (Dutch pronunciation: [ˈmɛxələ(n)] ; French: Malines [malin] ; historically known as Mechlin in English) is a city and municipality in the province of Antwerp in the Flemish Region of Belgium. The municipality comprises the city of Mechelen proper, some quarters at its outskirts, the hamlets of Nekkerspoel (adjacent) and Battel (a few kilometers away), as well as the villages of Walem, Heffen, Leest, Hombeek, and Muizen. The river Dyle (Dijle) flows through the city, hence it is often referred to as the Dijlestad ("City on the Dyle").

Mechelen lies on the major urban and industrial axis Brussels–Antwerp, about 25 km (16 mi) from each city. Inhabitants find employment at Mechelen's southern industrial and northern office estates, as well as at offices or industry near the capital and Brussels Airport, or at industrial plants near Antwerp's seaport.

The Dyle plan or Plan D was the plan of the commander-in-chief of the French Army, Général d'armée Maurice Gamelin, to defeat a German attempt to invade France through Belgium. The Dyle (Dijle) river is 86 km (53 mi) long, from Houtain-le-Val through Flemish Brabant and Antwerp; Gamelin intended French, British and Belgian troops to halt a German invasion force along the line of the river. The Franco-Belgian Accord of 1920 had co-ordinated communication and fortification efforts of both armies. After the German Remilitarization of the Rhineland on 7 March 1936, the Belgian government abrogated the accord and substituted a policy of strict neutrality, now that the German Army (Heer) was on the German–Belgian border.

French doubts about the Belgian Army led to uncertainty about whether French troops could move fast enough into Belgium to avoid an encounter battle and fight a defensive battle from prepared positions. The Escaut plan/Plan E and Dyle plan/Plan D were devised for a forward defence in Belgium, along with a possible deployment on the French–Belgian border to Dunkirk. Gamelin chose the Escaut plan, then substituted Plan D for an advance to the line of the Dyle, which was 43–50 mi (70–80 km) shorter. Some officers at Grand Quartier Général (GQG, general headquarters of the French Army) doubted that the French Army could arrive before the Germans.

50°45′N 3°59′E / 50.75°N 03.99°E / 50.75; 03.99The pagus of Brabant (Latin: Pagus Bracbantensis; Dutch: Brabantgouw) was a geographical region in the early Middle Ages, located in what is now Belgium. It was the first region known to have been called Brabant, and it included the modern capital of Belgium, Brussels. It was divided between the neighbouring counties of Flanders, Hainaut and Louvain (Leuven) in the eleventh century. It was the eastern part, which went to the Counts of Louvain, which kept the name in use, becoming the primary name of their much larger lordship. This led to other regions later being named Brabant - in particular, the French and Dutch-speaking areas east of the Dyle, including Leuven and Wavre, which are still known as "Brabant"; and secondly the province of North Brabant in the Netherlands.

The area of the old pagus of Brabant is and was multi-lingual, divided between Dutch (Flemish) speakers in the north, and French (including Picard) speakers in the south. Today the region includes not only bi-lingual Brussels, but also parts of the modern Dutch-speaking Belgian provinces of Flemish Brabant and East Flanders, and the French-speaking provinces of Hainaut and Walloon Brabant.