Battle of the Lys and the Escaut
1918 CE.
Shown on the map at 50.850°, 3.600°.
The Battle of the Lys and the Escaut was the third and last phase of the Second Battle of Belgium (French: 2ème Bataille de Belgique) or the Ypres-Lys Offensive, and took place in Belgium between 20 October and 11 November 1918.
Text from the Wikipedia article Battle of the Lys and the Escaut, licensed CC BY-SA 4.0.