BAF. Ouvrage des Sagnes was proposed but not built. Quartier Restefond Second company of the 73rd BAF. Ouvrage Col de Restefond (RD), petit ouvrage of three blocks (CORF) Ouvrage Restefond (RE), gros ouvrage of six blocks (CORF) Ouvrage Granges Communes (GC), petit ouvrage of two blocks (CORF) Avant-poste des Fourches (FO), six blocks watching the Col des Fourches (MOM) Quartier Rougna Ouvrage La Moutière (MO), petit ouvrage of four blocks (CORF) Abri de la Moutière with four entries (MOM) Avant-poste du Pra (LP), five blocks to watch the Pra valley (MOM) Casernement de Jausiers Casernement de Barcelonette Casernement de Restefond Baraquement de Viraysse Baraquement des Fourches Additionally, 36 concrete shelters were built by MOM in 1939 in the area. History When Italy declared war on France on 10 June 1940, the French forces along the Alpine Line amounted to two corps constituting the Army of the Alps. They faced two poorly equipped Italian armies, the 1st and 4th. The northern portion of the SF Dauphiné around Briançon was held by elements of the French XVI Corps, while the southern, Ubaye district was held by XIV Corps. These formations faced the Italian Fourth Army. Italian invasion of France Actions in the Briançon area were focused on the threat posed by the mountaintop batteries at the Italian Fort Chaberton, armed with eight 149mm guns in turrets. On 17 June 1940, Chaberton opened fire on the Fort de l'Olive, with little effect. The next day, infantry pressure was applied around the Cleyda blockhouse, and fire was exchanged between Italian batteries and ouvrage Janus. By the 20th, Italian forces of the Assietta Division were infiltrating around Montgenèvre and Chaberton was firing on Janus, Gondran, les Aittes and Infernet, cutting electricity to Janus. Janus operated on local power while a battery of 280mm mortars of the 154th Position Artillery Regiment (154e Régiment d'Artillerie de Position) was set up in two locations near Gondran and Infernet. Several columns of Italian infantry made probing attacks in the vicinity of Cerveyrette. On the 21st, Chaberton fired on Janus and Gondran, firing about 900 shells at Janus alone, causing moderate damage to the surface installations. However, the French mortar batteries were by this time in place. Fire from the heavy mortars damaged five of the eight Italian guns of Chaberton. The next day was relatively quiet, apart from some infantry infiltration by the Italian Sforzesca Division near the base