The slower , more deliberate methods , would conserve French infantry , as they battered through the deeper defences built by the Germans since 1914 .
The German defences would eventually collapse and make a breakthrough attack feasible .
The slower , more deliberate methods , would conserve French infantry , as they battered through the deeper defences built by the German since 1914 .
The German defences would eventually collapse and make a breakthrough attack feasible .