Polygon Wood formed part of the German third ("Wilhelm") line; large numbers of dugouts and foxholes were constructed within it.
Dugouts and foxholes were constructed within it. Polygon Wood formed part of the German "Wilhelm Line" defense system.
Polygon Wood formed part of the German "Wilhelm Line" defense system. Dugouts and foxholes were constructed within it.
Polygon Wood formed part of the German "Wilhelm Line" defense system. Dugouts and foxholes were constructed within it.