 These prisoners were detained in Pontmain in the department of Mayenne, Fort-Barreaux in Isère, in the military camp of Graveson (Bouches-du-Rhône), in Frigolet near Tarascon (Bouches-du-Rhône), Noirlac (Abbey) (Cher), and Ajain(Creuse).Other internment camps were used for Armenians in the 1920s-1930s (Mirabeau camp, Victor Hugo camp and Oddo Camp in Marseille); Gypsies after the 1912 Act on nomadism (for instance in the Royal Saltworks at Arc-et-Senans, but also in iron mines in the Manche and other disaffected industrial centers in Mayenne, in the Manche, in Loire-Atlantique, in the Sarthe, in the Maine-et-Loire, etc.