During the Third Ypres offensive, in the Battle of Broodseinde, Passchendaele Area in Belgium on the 4th of October 1917.
A German Regimental Commander, second from the left, with his Adjutant and Staff being held as prisoners of war in an enclosure at St Jean.
This group were captured in a dugout at Poelcapelle.
Broodseinde;
In the early hours of 4th of October, twelve divisions of British and Australian troops moved silently into position for the third stage of General Herbert Plumer's drive to secure the ridges to the east of Ypres. The objectives were about fifteen hundred yards away, and the advance would be covered by a creeping barrage, which would protect them while they consolidated their positions.
Before the attack began, the Australian troops were heavily shelled on their start line, losing about a seventh of their number as casualties. The Germans had chosen the same day - just fifteen minutes later - to launch their own attack, and as the Allied troops advanced, they were confronted by advancing Germans.
The Australians fought through the German advance and took their objectives, but suffered 6,500 casualties as they fought to take the well-defended German pillboxes.