any) electric power supplies and underground troop accommodations. A number of the later CORF-proposed ouvrages were carried out by MOM, many of which were incomplete in 1940. These MOM-built positions covered secondary passes and mountain basins. The Col de Larche corridor was defended by the CORF-built gros ouvrage Roche-la-Croix, its upper battery and the Forts Tournoux and Viraysse, as well as a variety of CORF positions around Saint-Ours. The Montgenèvre corridor was covered by the extensive network of forts around Briançon, centering on the renovated and expanded fortifications at Janus. The Col de la Bonette received attention as well, despite its altitude, with the gros ouvrage Restefond and three subsidiary petits ouvrages. Troop units for these fortifications were extensively customized to deal with the fragmented nature of the military positions. Typical, somewhat confusingly-named units included: Alpine Fortress Demi-Brigade (Demi-Brigade Alpin de Forteresse (DBAF) ) Alpine Hunter Demi-Brigade (Demi-Brigade des Chasseurs Alpins (DBCA) ) Alpine Infantry Regiment (Régiment d'Infanterie Alpin (RIA) ) Alpine Fortress Battalion (Battaillon Alpin de Forteresse (BAF) ) Alpine Hunter Battalion (Bataillon des Chasseurs Alpins (BCA) ) These formations were supplemented by Position Artillery Regiments (Régiments d'Artillerie de Position) (RAP) ), which provided mobile artillery support. A demi-brigade was similar to a large regiment, with three demi-brigades equivalent to four regiments. Command The Dauphiné sector was under the overall command of the French Army of the Alps, headquartered at Valence, under the command of General René Olry. Subordinate to the Army of the Alps was the 14th Army Corps under General Beynet. The SF Dauphiné itself was commanded by General Cyvoct at Gap and La-Roche-de-Rame. The interval troops, the army formation that was to provide the mobile defense for the sector, to support and be supported by the fixed defenses, was the 64th Infantry Division. Artillery support for the sector was provided by the 154th and 162nd Position Artillery Regiments (Régiment d'Artillerie de Position (RAP)), which controlled both fixed and mobile artillery, commanded by Lt. Colonel Maury and Chef d'Escadron Jarrix, respectively. The 64th ID was made up of Class B reservists, not suited for sustained combat, under General de Saint-Vincent at Embrun. Description The sector includes, in order from west to east, the following major fortified positions, together with the most significant casemates and infantry shelters in each sub-sector: Briançonnais district The direct command of the Briançon valley remained with General Cyvoct, with a command post at