Frontline trenches. Group of French servicemen, “Poilus”,  in front of the entrance of a cote. Woods of Hirtzbach. (Haut-Rhin. France. June 16th, 1917).
From David Latapie (merci beaucoup!)

“Poilus” (hairy) is the nickname to French WWI soldiers, since they could not afford the luxury of regular shaving. It is a  term of affection, especially now.

Tranchée de 1ère ligne. Groupe de militaires Français “Poilus”, devant l’entrée d’un abri. Bois d’Hirtzbach. (Haut-Rhin. France. 16 juin 1917).