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
- During this static and trench warfare, defenders were needed in reserve behind the front line.
- Here there is an example for the second line with its defense spaces like those of the front, in case it has been overwhelmed by the enemy.
- As for the frontline, casemattes were also dug for sheltering and rest of the soldiers.
- Small stations or sentinels were carefully arranged in order to keep watch.
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