Individual tanks, commanded by gallant young officers and served by brave crews, did astounding feats, and some of these men came back dazed and deaf and dumb, after forty hours or more of fighting and maneuvering within steel walls, intensely hot, filled with the fumes of their engines, jolted and banged about over rough ground, and steering an uncertain course, after the loss of their “tails,” which had snapped at the spine. But there had not been anything like enough tanks to secure an annihilating surprise over the enemy as afterward was attained in the first battle of Cambrai; and the troops who had been buoyed up with the hope that at last the machine-gun evil was going to be scotched were disillusioned and dejected when they saw tanks ditched behind the lines or nowhere in sight when once again they had to trudge forward under the flail of machine-gun bullets from earthwork redoubts. It was a failure in generalship to give away our secret before it could be made effective.