It was mostly abandoned when the French realised how little resistance similar structures in Belgium had offered to German heavy artillery. The Germans took it without much of a fight, then the French took it back a few months later much the same way.
In use, I believe.
It was mostly abandoned when the French realised how little resistance similar structures in Belgium had offered to German heavy artillery. The Germans took it without much of a fight, then the French took it back a few months later much the same way.