Several underground complexes were observed in the flanks of the Kemmelberg, including the Lettenberg, an offshoot of the Kemmelberg. In the spring of 1917, British units of the 175th Tunnelling Company built concrete bunkers there that housed a command post.

Collapsed galleries

The four remaining bunkers gave access to an underground command post, which also provided sleeping quarters. However, the corridors to the galleries behind it collapsed. 

Red Cross

In April 1918, during the Battle of Mount Kemmel, the Germans successfully attacked. They captured the famous hill. On the Rodeberg, Zwarteberg and Scherpenberg, however, the Germans gritted their teeth.

Bloody battle for the Kemmelberg

In September, led by the Americans, a successful counter-offensive was launched and the Kemmelberg fell back into Allied hands. The battle for the Kemmelberg was in vain but cost the lives of 200,000 soldiers.