article_snippet.sent: Above, German Red Cross workers carry bottles of water to help revive troops .
article_snippet.sent: It is indiscriminate,' said Piet Chielens, curator at the In Flanders Fields Museum in nearby Ypres.  
article_snippet.sent: A century ago German forces were gathering at army headquarters in Tielt, some 30 miles (50km) behind the front line, for a momentous discussion.
article_snippet.sent: Commanders had already been waiting 10 days for favourable winds, huddled in a patrician mansion lined with maps and dotted with landscape models.
article_snippet.sent: I German soldiers stand and sit at German soldiers planning desks at an office in Tielt, Belgium. 
article_snippet.sent: Gas masks in German trenches containers are piled up (left) in Zillebeke, Belgium, as the director of the In Flanders Fields Museum Piet Chielens looks at postcards written by victims of the first gas attacks (right)
article_snippet.sent: Above, graves of French soldiers in Zonnebeke, Belgium .
article_snippet.sent: Laurence Cadbury, of the British chocolate dynasty, had come to Flanders to help as an ambulance driver.
article_snippet.sent: Memorial stones commemorate those who lost those who lost their lives as a result of the first gas attacks lives as a result of the first gas attacks.
article_snippet.sent: Above, a old bunker constructed by the German army stands in one of the fields .
article_snippet.sent: The veterans of the war took it with The veterans of the war to The veterans of the war graves.'
article_snippet.sent: Dormant shells littered farmland.