In Pronville the Germans erected the elaborate ferro-concrete trap seen in the picture
Canadian officers beside German fortifications at Pronville, France, during World War I. Canadian officers demonstrate how their lorry was just wide enough to breach the gap in the German fortifications at Pronville. German fortifications were often superior in design and construction to Allied ones. The Germans originated the use of concrete in building dug-outs and trench systems, and the scale of the concrete, iron and wire construction in the picture demonstrates the German desire to build strong, lasting defences. Pronville is a town in the Pas de Calais region in north-east France. It was in this area that Canadian troops were most heavily concentrated in the final months of the war. [Original reads: 'In PRONVILLE the Germans erected the elaborate ferro-concrete trap seen in the picture. The gap is large enough for a lorry but would have stopped a tank. To the consternation of the enemy the Canadians advanced here without the support of the dreaded land ships.'].