In the Hague Conventions of 1899 and 1907, the use of dangerous chemical agents were outlawed. In spite of this, the First World War saw large-scale chemical warfare. France used teargas in 1914, but the first large-scale successful deployment of chemical weapons was by the German Empire in Ypres, Belgium in 1915, when chlorine gas was released as part of a German attack at the Battle of Gravenstafel.

- Wikipedia, The Geneva Protocol.

Avoid the deadly Chlorine Gas as you make your way through the trenches. Press SPACE or RETURN to pick up and put down objects.

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