Ancienne batterie du champ de Mars

After the War of 1870, the Grand Etat Major decided to fortify the area around Paris. In the eastern part of the massif, a set of fortified structures is built, forming part of the second belt protecting the capital, the Trou de l'Enfer fort, as well as five batteries occupying an area of ​​50 hectares in the forest. Worse than the Auberderie, there is really nothing more!