Following the general movement of the army, he moved his brigade to Diksmude, then, after a short rest, he was directed to the region of Lizerne, to organise defensive positions on the Yser Canal.

After the Allied victory in this battle, de Ceuninck was encharged with occupying the Oostkerke sector, where he had under his command a half-battalion of French Fusiliers Marins.

At the beginning of March, de Ceuninck retook the Drie Grachten – Maison du Passeur sector, which spread as far as Steenstraet, where the Belgians were in contact with French troops.

After the battle, French President Poincare and General Joffre congratulated the Belgian troops and awarded de Ceuninck the cross of commander of the Legion d'Honneur.

[citation needed] His concerns were also constantly occupied with the material welfare and morale of the officers and soldiers with whom he had fought for three years.