It was with the Hindenburg Line that the 4th Tank Brigade was concerned.

On the front of the 4th Army, with which our Brigade was now operating, the Hindenburg Line, a series of defences 7,000 to 10,000 yards in depth, was itself defended by the St Quentin Canal. For three and a half miles, between Vendhuille and Bellicourt, the canal passes through a tunnel, and this stretch it was determined to attack. But before the main operation could take place, it was urgently necessary to capture certain outlying points of vantage known as The Knoll and Quennemont and Guillemont Farms. Already we had attempted unsuccessfully on three occasions to carry them by storm. A final attempt was to be made by the 108th American Infantry Regiment on September 27th, and one section of Carrier tanks was ordered to assist. Ryan, who had been in command of the company during my absence, had detailed his own section for the job.

On the afternoon of the 25th, Ryan and I reported at the Headquarters of the American Division concerned, the 27th. The American Staff was a little flustered and confused, ... but we found to our gratification that Australian Staff Officers were "nursing" the Americans​—​there were a number of Australians with each American unit​—​and we soon obtained the orders and the information which we required. The Australians knew us and we knew the Australians: nothing could have been more satisfactory. The Americans, on the other hand, had never heard of Carrier tanks, although they appreciated in theory their use at once.

Ryan's tanks moved by easy stages to a copse three-quarters of a mile from Villers-Faucon, where they were loaded on the 26th with ammunition, wire, water, and sandbags. They were joined by unloading parties of American infantry, eight men to each tank, bright young fellows who had not previously been in action. I doubted whether they would be of use: to follow a slow Carrier tank into action and to unload it in sight of the enemy under heavy fire needs the coolness and skill of veterans.

It was a little characteristic that, while the quartermaster who brought the supplies to Ryan's tanks was more than eager to help and almost embarrassed me with his explanations and suggestions, the unloading parties gave us a sad fright by arriving at the last moment. They had received no written orders, and, after wandering aimlessly round the country "for some other tanks," came in at dusk dead-tired.

On the night before the battle the tanks moved up to points in the rear of our posts, and thirty minutes after "zero" they followed the fighting tanks and the infantry. The shelling was severe.

The first tank under Sergeant Broughton reached its objective, but, as the unloading party had lost touch with it on the trek forward, the crew were compelled themselves to unload the tank. Apparently the attack had been checked, for Sergeant Broughton found that he was so close to the enemy that he could see them firing. He completed the dump, swinging the tank to give the men as much cover as possible from machine-gun bullets, though without help it was painfully slow work, and half his men were wounded. On the way back the tank struck a land-mine, and it was set on fire. The survivors crawled back into camp late in the afternoon.

The second tank, under Thomas,[35] became "ditched" in a huge crater a few hundred yards from its objective. It was so heavy loaded that the unditching beam could not be used, and such intense machine-gun fire was directed at the tank that Thomas quite properly did not ask his men to attempt to unload the roof. It would, in any case, have been a laborious job, since the unloading party had missed the way. Three attempts were made to extricate the tank from the crater into which it had slipped, but each attempt failed. The German gunners were more successful, for by dusk they had blown the tank into a fantastic tangle of twisted wreckage.

The third tank struck a land-mine on the way forward. Two of the crew were killed instantly, and a third man was severely wounded. Ryan, who was walking beside the tank, was badly injured​—​his ankle was shattered by the force of the explosion.

Read and I had tramped up to Ronssoy, a large industrial village in which were the headquarters of the 108th Regiment. It was a damp steamy day. The Americans were puzzled and disconsolate. Their infantry, led gallantly by tanks of the 4th Battalion, had undoubtedly advanced, but the reports were so conflicting that no one could say definitely how the line ran. It appeared that the Americans had not "mopped up" with any success, since there were parties of the enemy between the Americans who had attacked and the posts which they had left at "zero." In places the Germans seemed to be farther forward than they had been before the attack commenced. Of the fighting tanks the majority had received direct hits,[36] and the crews, mostly wounded, were staggering back by twos and threes into Ronssoy. It was no wonder that Sergeant Broughton had found himself under the very noses of the enemy. With the main attack still to come, the situation could not have been more unsatisfactory.