The American Tanks experienced the bitterest of war’s accidents, useless destruction at the hands of their own colleagues. The explosions were terrific, the whole bottom of many machines being torn out and a large proportion of the crews being killed. A little further to the south our attack was progressing well. Tanks of the 4th and 5th Battalions and their infantry had pushed forward. The intricate trench system and the confusion of wire and dug-outs, however, were responsible for a certain loss of cohesion, so that by the time the village of Bellicourt had been reached the attacking troops were some distance behind the barrage, and a good deal of the weight had gone out of the assault. But though several large parties of the enemy still held out, we had, on this sector, actually penetrated the Hindenburg Line before noon. But now the mist began to lift. The enemy still held Quennemont Farm and the land to the north of it in great strength, and from that high ground they were now beginning to be able to see well enough to pour a devastating fire into the backs of the troops who were advancing in the Bellicourt Sector. The situation was critical and called for immediate action. Major Hotblack, the Head of the Tank Corps Intelligence, who was watching the progress of the battle near this point, luckily realised the situation before the enemy and rushed to try to improvise a diversion. He fortunately found two Tanks[97] which were waiting, ready to take part in a later stage of the attack. With the permission of the Battalion Commander, the two machines were hastily set going, and Major Hotblack jumped into the leading Tank. The machines were driven rapidly towards Quennemont Ridge. There was no body of infantry immediately available, and with the weather in its present mood, there was no time to wait; so the two Tanks without artillery or infantry support attacked what afterwards proved to be an unbroken sector of the enemy’s front. But if confusion reigned in the British line, there is no doubt that the Germans, though fighting exceedingly well, were far from clear about the actual position. In the confusion, they appear to have mistaken the two isolated machines for a considerable force. The two Tanks successfully made their way on to the heretofore impregnable Ridge, and actually succeeded in driving the enemy off it, killing large numbers of the defenders and capturing a quantity of machine-guns. Then at last the German field gunners awoke to the situation, and being otherwise unharassed, opened a devastating fire upon the two presumptuous machines. They succeeded in hitting and setting fire to both of them, the crews being obliged to evacuate, having suffered considerable casualties.