https://www.thetimes.co.uk/edition/register/fighting-in-a-tunnel-nls2n9grs
OCTOBER 2, 1918
Fighting in a tunnel
The Germans have been beaten from their great defence, the Hindenburg Line, on which their newspapers, their generals, and their public men have assured them they could place trust, and are retiring eastwards. The heavy blow delivered by Americans and Australians on September 29, at its point of greatest strength between Bellicourt and Bony, with the deeper blow magnificently delivered by English troops to the south, staggered the Germans holding this vital point.
The German Staff hastily rushed in every division available in order to stop the gap. The 121st, 54th, and l85th Divisions and the 75th Reserve Division were in the Hindenburg line opposite the American divisions, which made their great assault on Sunday. That day’s fighting shattered and disorganized them to such an extent that they rushed up three divisions into the line at the same point. These were the 2nd Guard Division and the 21st Division, which already smashed by Australian attacks had only been resting a fortnight, and the 119th Division.
But the Germans knew the Hindenburg line was already lost. All yesterday troops and transport were withdrawing along the roads leading east. The Australians and Americans managed yesterday to reach the village of Bony, which for two days held up the advance, and today Australian patrols are well beyond it, and nearing the northern entrance of the great tunnel of which they already hold the southern end.
This morning the Germans still hold the northern end of the great canal tunnel while we hold the south. The barges on which the German troops lived still lie inside the tunnel, and beside the towpath inside the entrance. The entrance to the tunnel is 80ft below the hill surface. Somewhere in that black interior lies the point where the Australian possession of the towpath ends and the German begins, but probably neither Australian nor German knows where that point is. Possibly by now our troops are through, but the fighting yesterday was always stiff in the labyrinth of surface trenches.
The country reached by our troops is now green and less broken by shell fire. The shell-shattered band where British and German Armies faced one another along the Hindenburg line last winter is now passed.