After the battle began, or immediately before the battle, the Germans by night brought their divisions from the northern part to the point where the attack took place. They also took several divisions from opposite the French in the same way and brought them to our front. But it would have been equally easy for them, while concentrating troops opposite our front, to manoeuvre them in the same way opposite the French. I am only referring to that in order to show how exceedingly difficult it is for Generals on the defensive to decide exactly where, in their judgment, the attack is coming and where they ought to concentrate their reserves. General Wilson's Forecast I may just say a word here. This problem was considered very closely by the military staff at Versailles, and I think it right, in justice to them, to point out that after a very close study of the German position and of the probabilities of the case, they came to the conclusion, and they stated their conclusion to the military representatives and to the Ministers in the month of January, or the beginning of February, that the attack would come south of Arras; that it would be an attack on the widest front ever yet assailed; that the Germans would accumulate ninety-five divisions for the purpose of making that attack; that they would throw the whole of their resources and their strength into breaking the British line at that point, and that their objective would be the capture of Amiens and the severance of the British and French forces. That was the conclusion which Sir Henry Wilson, Chief of the Imperial Staff, came to, and which was submitted at that time, two or three months ago, and I think that it was one of the most remarkable forecasts of enemy intentions ever made. As a matter of fact, the attack was made up, I think, by about ninety-seven divisions. It was an attack on the widest front that had ever been engaged. Its object undoubtedly was the capture of Amiens and the severance of the British and French forces. So that, almost in every detail, that very remarkable forecast has been verified in the event. Another remarkable prediction was that it might probably succeed in penetrating the British line to the extent of half the distance of the front attacked. They came to the conclusion from a close examination of the offensives of the war. Advantage of United Command There was another advantage. There was, first of all, the advantage which the Germans had from having the initiative. There was a further advantage they had, and this undoubtedly was the greatest advantage, from having a united command opposed to a dual one. The Germans undoubtedly relied on this to a very large extent for their success. They owe much of the success of this attack to this.