november 30, 1917
Hindenburg main trenches
The main trench of the advanced line of the Hindenburg system was deep, narrow, very cleanly cut, and well built, with numbers of strong points, snipers’ posts, and so forth, but apparently without dug-outs. The main trench of the second line, 500 to 1,000 yards behind, is of immense width, 16ft in most places, presumably for the purpose of checking the Tanks. Both at the front and rear the trench descends perpendicularly some five feet to a broad bench or fire step, which is four or five feet above the level of the trench bottom. At places there are trench-mortar positions, where the trench widens out into a great chamber of some 30 by 40ft. Everything is on the same colossal scale. The third main trench is built on a similar plan. Besides these the whole area, to a depth from one and a half to two miles, is intersected with support and communication trenches, besides barbed wire in quantities almost incredible. The dugouts indicated that they were meant to be held by a considerable permanent garrison. Everywhere there are signs of this expectation of permanent possession, and of the suddenness of the evacuation.
The barbed wire entanglements were of extraordinary strength, not merely in depth and complication, but also in the character of the individual strands, some of which were so thick as to be very difficult to cut with hand nippers, and so densely set with barbs over an inch in length as to be almost impossible to take hold of. Barbs like great acacia thorns were so close together as to be almost continuous, and there was not even room to grasp the wire with the thumb and finger. Before the great main line, a deep belt of this wire was set well forward, some 50 yards from the trench, then between it and the trench a further deep belt, broken into islands and built in cunning patterns, with openings through which the defenders could sally. When the attackers penetrated the front belt they would be herded to the openings, which, of course, were swept by machine-guns.
The amount of labour expended on the Hindenburg defences is simply tremendous and most craftily planned. That we should have broken through with the suddenness we did will remain one of the most extraordinary feats of this war.
The amount of labour expended on the Hindenburg defences is simply tremendous and most craftily planned. That we should have broken through with the suddenness we did will remain one of the most extraordinary feats of this war.



