Read the excerpt from a newspaper article about world war i. the gaseous vapor which the germans used against the french divisions near ypres last thursday, contrary to the rules of the hague convention, introduces a new element into warfare. the attack of last thursday evening was preceded by the rising of a cloud of vapor, greenish gray and iridescent. that vapor settled to the ground like a swamp mist and drifted toward the french trenches on a brisk wind. what does the article reveal about the use of chemical weapons? the germans overpowered the french by using chemical weapons. by early 1915, both germany and the allies often used chemical weapons. the hague convention had prohibited the use of chemical weapons. early chemical weapons acted more like a blinding mist than a poison.