France. - French position in the forest. Officers and soldiers come out of the dugout and cross a wooden bridge. The soldiers are transporting a gun on a mule across the bridge, rolling a cart with food. The sappers in the dugout are preparing the compressor for work, one of them is holding a drill in his hands. The sapper drills the ground. Fil-Mort French trenches. The explosion of a French mine in a tunnel under the German positions. French soldiers are firing from a heavy weapon.