Major Jules thought this was a "suicide" attack, but it wasn't.
They changed into German army uniforms and helmets, which were easy to obtain because there were injured soldiers everywhere in front of the defense line who had been downed by directional mines. The downside was that the uniforms had bullet holes or bayonet punctures.
But who would notice this in the dark? Even though it was unpleasant to wear them sticky with blood.
Then, they divided into several batches and set out carrying "wounded soldiers" in units.
No one stopped or checked them along the way, as everyone was hustling for the sudden influx of wounded.
The German army was in chaos, or rather fearful, worried that the next order would send them to the front line, and then they too would become among the wounded.
Major Jules, who spoke German, even overheard the German soldiers whispering:
"They said Shire is here, right across. Is that true?"
"Who else do you think could create such a weapon?"