5 - 2nd line, sentinel and tactic hoses - Site officiel de"Vallée de la Cisse" : étudier de manière pluridisciplinaire les questions culturelles et diffuser les résultats des recherches par divers moyens sur nos 18 communes fédérées de la Vallée

This training ground has been built up gradually.
In the final phase that we know, the arrival on the second line is made through 5 different entries with connecting hoses that have used the future "poilus"* to move in a complex network.
In this way, we can assume the idea that the "blue" soldiers were prepared to be in contact with the frontline and the defense network, which were constantly reconstructed and described in private letters.

*popular name for a soldier in France during the First World War

5 - 2nd line, sentinel and tactic hoses