The trenches they constructed are sometimes only a few meters apart. A visit to the Mémorial du Linge shows you the barbed wire-fortified front line between both trench complexes and takes you through the heavily fortified trenches on the German side, equipped with concrete bunkers.
Trench system
What remains of those trench systems today is only a fraction of the front line in the First World Wars. The two armies stood nose to nose here over more than 2 kilometers.