The village was founded by
Saint Grimony, a saint of Irish origin of the 4th century. The village was of strategic importance, defending the French border against Avesnes-sur-Helpe, which was Spanish. It is 16 km from the Belgian border. On 7 November 1918, at the end of World War I, it was at La Capelle that the German
plenipotentiaries (headed by
Matthias Erzberger), who had come to negotiate the armistice, crossed the front lines and met the commander
Bourbon Busset. They were taken by car to
Homblières, then to
Tergnier where a special train was waiting to bring them to the clearing of
Rethondes in the forest of Compiègne where on the morning of the 8th
Marshal Foch, with the allied delegation, was awaiting them in his command train. During World War II in 1940, during the
Phoney War, General Paul Barbe installed at La Capelle the command post of his division, the 4th Light Cavalry Division. == Heraldry ==