 At that time, French bicycle riding 3e Groupe de Chasseurs Cyclistes were in Ledringhem during the First Battle of Ypres in November 1914.As the war turned into a trenches war with the front established to the east near Ypres, some 30 km away, Ledringhem served as a resting and training place ("billet") to the rear.French 12th cuirassiers were there in December 1914-September 1915, British horse-riding 20th Hussars 7 May 1915, the 75th Brigade RFA in May–June 1916, the 1st Royal Marine Battalion from 14 to 22 November 1917, French 114ème Régiment d'Artillerie Lourde and 15e Régiment de Dragons in May 1918, and 2e Régiment d'Artillerie de Campagne in August 1918.