The Battle of the Yser (French: Bataille de l'Yser, Dutch: Slag om de IJzer) was a battle of the First World War that took place in October 1914 between the towns on Nieuwpoort and Diksmuide, along a 35-kilometre (22 mi) stretch of the Yser River and the Yperlee Canal, in Belgium. The front line was held by a large Belgian force, which halted the German advance in a costly defensive battle.