On June 15th, more than a kilometre of trenches was actually recaptured from the enemy.
On the summit of Mort-Homme, the Monument to the 69th Division.
In 1917, the sector was often the scene of violent combats, the Germans ending by occupying Hills 265 and 295. In these they organised formidable defences, according to their usual practice, especially as regards deep shell-proof tunnels. During the offensive of August 20th 1917 the 31st Infantry Division recaptured Mort-Homme and its tunnels.
Follow the clearly marked path which ascends the slopes of Mort-Homme as far as the monuments to the 40th and 69th Divisions. By following the trench a little beyond the monument to the 40th Infantry Division and to the right, one reaches the mouth of and steps down to the Bismarck tunnel. Continue along the ridge towards Corbeaux wood, from whence there is a panorama view of the valley of the Forges stream and the heights north of this valley (the old French line of March 1916). On the right can be seen Caurettes ravine with its denuded wood.
About 200 yards in front of the edge of Corbeaux wood, a stairway with a hundred steps gives access to an enormous German tunnel, joining Forges ravine and Caurettes ravine.
This tunnel, called Corbeaux tunnel by the French and Gallwitz tunnel by the Germans was captured by the 7th tirailleurs of the famous Morocco division.