A gas attack during World War 1. Gas shell explosion in a battlefield. French soldiers in a bomb crater in the battlefield as gas smoke drifts towards them. French soldiers in crater motionless while wearing gas mask as gas spreads through the battlefield. French soldiers in a trench wear gas masks (ARS-17 or Appareil Respiratoire Spécial) to protect themselves from a gas attack.
French soldiers positioned in a cave opening near Maurepas, Yvelines region, during World War I. Barricades in front of the dug out. A French soldier sits in the cave opening with a machine gun. Another soldier near him loads the machine gun.