"It is important to remember, the letter continues, that the Hindenburg line at that time presented an insoluble problem. The sea of wire which protected its well-developed trenches and machine-gun positions was placed almost throughout on the reverse slope of the hills or rising ground of which the line took advantage. The artillery observer could hardly get a view of the wire at all; beside which, it was so deep it would have taken a month to cut it by artillery fire.

"The tank provided the solution—the only solution. The tank, by crushing down the wire—in a few minutes—was able to do what there seemed no other way of doing. And the tank success at Cambrai was not a mere flash in the pan. To the end of the war the Hindenburg line, or any other line organised in the same way, was entirely at the mercy of the tanks.

"The tanks, however, did not make their full weight felt until August, 1918. They had become a very important factor before that, and had saved thousands of lives; but from the beginning of the counter-offensive of last year they were a dominating feature of the war. Ludendorff had already recognised their importance in July, after the French use of them in the Battle of Soissons, when he wrote to his Army Commanders that 'the utmost attention must be paid to combating tanks. Our earlier successes against tanks led to a certain contempt for this weapon of warfare. We must now reckon with more dangerous tanks.'"

The "earlier successes" mentioned were those of the Third Battle of Ypres. In the Ypres salient, however, the real anti-tank defence was the mud, and the general conclusions which the German Higher Command drew from the derelict tanks they captured during the fighting of October, 1917, were entirely misleading, as they soon discovered to their cost, a few weeks later, in the First Battle of Cambrai. They showed, indeed, throughout a curious lack of intelligence and foresight with regard to the new weapon, both as to its possibilities and as to the means of fighting it. They were at first entirely surprised by their appearance in the field; then they despised them; and it was not till July and August, 1918, at the beginning of the last great Allied offensive—when it will be remembered that Sir Henry Rawlinson had 400 tanks under his command—that the Germans awoke—too late—to the full importance of the new arm.

Thenceforward "the enemy was overcome by a great fear of the Allied tanks, and in some cases even over-estimated their effect." But it was now too late to put up an adequate defence against "the more dangerous tanks," which were already available in large numbers on the Allied side. It seems incredible, but it is true, that the Germans never possessed at any time more than fifteen tanks of their own, plus some twenty-five captured and repaired British tanks; and the only action in which they employed them with any considerable success was at the capture of Villers Bretonneux, April 24th, 1918 (the success which was so quickly turned into defeat by the Australians). After last July, however, the German panic with regard to them grew rapidly, and on the 15th of August we find it stated that everything possible must be done to give the artillery "freedom of action in its main rôle, viz., the engagement of tanks." "Its main rôle!" The phrase shows that under the pressure of the tanks, the two chief pillars and axioms of the former German defence system—"protective barrages" and "immediate counter-attack"—were giving way, in the case at least of tank attacks, with, of course, the natural result of confusion and weakness. After the Battle of Amiens (August 8th) the German Command issued an explanation of the defeat, signed by Ludendorff. Chief among the reasons given appears: "The fact that the troops were surprised by the massed attack of tanks, and lost their heads when the tanks suddenly appeared behind them, having broken through under cover of fog and smoke." The Crown Prince's group of armies reports on the same battle: "That during the present fighting large numbers of tanks broke through on narrow fronts, and, pushing straight forward, rapidly attacked battery positions and the headquarters of divisions. In many cases no defence could be made in time against the tanks, which attacked them from all sides."

And the peremptory order follows:

"Messages concerning tanks will have priority over all other messages or calls whatsoever."

Naturally the German Army and the German public had by this time begun to ask why the German Command was not itself better equipped with tanks before the opening of the Allied offensive. The answer seems to be, first of all, that they were originally thought little of, as "a British idea." "The use of 300 British tanks at Cambrai," says a German document, "was a 'battle of material.' The German Higher Command decided from the very outset not to fight a 'battle of material.'" They preferred instead their habitual policy of "massed attack"—using thereby in the fighting line a number of inferior men, "classified as fit for garrison or labour duties," but who, if they "can carry a rifle, must fight." The German Command were, therefore, "not in a position to find the labour for the construction of new and additional material such as tanks." For the initial arrogance, however, which despised the tanks, and for the system which had prevented him from building them in time, when their importance was realised, the enemy was soon plunged in bitter but unavailing regrets. All he could do was to throw the blame of failure on the Allies' new weapon, and to issue despairing appeals to his own troops. The Allies were sometimes stated to have captured such and such a place "by the use of masses of tanks," when, as a matter of fact, very few tanks had been used. And this convenient excuse, as it appeared in the official communiqués, began soon to have some strange and disastrous results. The German regimental officer began to think that as soon as tanks appeared, it was a sufficient reason for the loss of a position. For the German Army last year might be divided into three categories: "A small number of stout-hearted men (chiefly machine-gunners), who could be depended on to fight to the last; men who did not intend to fight, and did intend to put up their hands on the first occasion; and, thirdly, the 'great middle class,' who were prepared to do their duty, and had a sense of discipline, but who could not be classed as heroes.... It was they who came to consider that when tanks arrived, 'there was nothing to be done.'"

Moreover, the failure of the German Higher Command to produce tanks themselves to fight those of the Allies had a very serious effect, not only on the faith of the troops in their generals, but also on the morale of the public at home. German war correspondents and members of the Reichstag began to ask indignant questions, and the German War Office hurriedly defended itself in the Reichstag. As late as October 23rd General Scheuch, the German War Minister, declared: "We have been actively engaged for a long period in producing this weapon (which is recognised as important) in adequate numbers." It seems to be true that efforts were then being made, but not true that these efforts were of long standing. "Altogether 'slowness' was the keynote throughout of the German attitude towards the tank idea." He neither appreciated their true use nor the best means of fighting them; and even when we presented him with derelict tanks, as was soon the case on the Ancre in 1916, he failed to diagnose the creature accurately.

"It is natural, I think," my correspondent continues, "that the British should pride themselves on being the introducers and leading exponents of this weapon. What the future will bring no one knows; but if war is to persist, there can be no doubt that mechanical means in general, and tanks in particular, must develop more and more. If any civilised state is compelled to use force, it will, if really civilised, strive to sacrifice its wealth and its material as far as possible, rather than its human lives.