Between 1892 and 1894, the French constructed new works on the old. In 1897 the fort was unveiled by President Félix Faure and named in honour of the old fort. It was incorporated into the sub-sector of Tarentaise of the fortified sector of Savoy, part of the Alpine Line extension of the Maginot Line in the 1930s. It did not see action until the Italian invasion of France in June 1940. Garrisoned with seventy men plus machine guns commanded by "Sous-lieutenant" Henry Desserteaux, it withstood the Italian besiegers for four days before the Franco-Italian armistice. On 3 July, eight days after the armistice, the surrendered garrison marched out with the honours of war. In the winter of 1944–45, the fort was used by the Italians and Germans. A garrison of forty-six soldiers defended it against French attacks during the second Battle of the Alps. It was retaken by France on 29 April 1945.