This mountain range, the site of battles in 1945, offers spectacular trails winding through military sites, including the Trois Communes redoubt, France’s first reinforced concrete fort.
Geographically, the Pointe des Trois Communes is the highest peak in the Authion massif, at an elevation of 2,090 meters, and its tip is the point that extends furthest toward the Italian border. Construction of the blockhouse—the first reinforced concrete structure of its kind in France—began in 1897. This strategic structure was designed to serve as a solid military stronghold capable of holding its ground from the very first days of combat against an Italian invasion. Its purpose was to prevent the enemy from gaining a foothold on the path through the Col de Raus leading to Vésubie, to contain enemy attacks through the Caïros and Praët valleys, and to protect the redoubts at La Forca and Millefourches. After World War I, the blockhouse served as a border post for French customs officials until 1939. During the Battle of Authion in April 1945, the redoubt was occupied by the German 34th Mountain Division. After fierce fighting, the 1st Free French Division, under the command of General Garbay, captured the position.
The Redoute was chosen as a memorial site to pay military honors to the first casualty of the Battle of the Alps, Alpine soldier Jean Rigot (S.E.S. of the 75th B.A.F.), who was killed on June 14, 1940, at Grand Capelet.