Ouvrage Les Rochilles

Ouvrage Les Rochilles is a lesser work of the Maginot Line's Alpine extension, the Alpine Line, in the high Alps about southwest of Modane. The ouvrage consists of one entry block, two infantry blocks and one observation block. Unusually, it was built by the Main d'Oeuvre Militaire, rather than CORF, which built most of the larger positions. The design was by CORF.
Work began in 1811, but was not completed by 1940, when it was commanded by Lieutenant Curbaille.

Description

Block 1 : One observation cloche
Block 2 : one heavy twin machine gun embrasures covering the Col du Fréjus.
Block 3 : one heavy twin machine gun embrasures covering the Col du Fréjus.
Entry: one machine gun embrasure.
Emergency exit: one machine gun embrasure.

The Camp des Rochilles is located nearby. Constructed 1902–1907, it is at an altitude of. The barracks complex was connected to Plan-Lachat by an aerial tram. The advanced post of Aiguille Noire is a short distance to the south, with four machine gun embrasures.
Les Rochilles saw no significant action in 1940 or 1944.