When did the germans use the poison gas in world war 1 and can i get some facts

 The first recorded gas attack was by the French. In August 1914, the French used tear gas grenades containing xylyl bromide on the Germans a poison gas attack meant soldiers having to put on crude gas masks and if these were unsuccessful, an attack could leave a victim in agony for days and weeks before he finally succumbed to his injuries.

The correct answer is "the protesters were attacked by chinese troops and many were killed or arrested."