The Fort de la Croix-de-Bretagne is a fortification in the vicinity of Briançon in the Dauphiné region of southeastern France.

It overlooks the valley of the Durance from an altitude of 2,016 metres (6,614 ft) and monitors the Cervière road to Italy.

[1] The position was used by the French Army in the defense of Briançon until 1940, when it was part of the Fortified Sector of the Dauphiné.

[2] The position overlooks the earlier Fort des Têtes and, in conjunction with the Grande Maye, was planned to bar an advance from Italy over the Col de Montgenèvre in the vicinity of the Gondrans.

Croix-de-Bretagne and the Fort de l'Infernet provided each other mutual support.