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| | ww1, 1914-18, mustard gas |
 | | In ancient times fires were lit so that smoke choked the other side, especially if the things you were burning was soaked in tar or oil. |
 | | It fitted in the yellow cross catagory, it was called mustard gas because of it's smell. |
 | | The reasons for this was, that it was difficult to detect, it penetrated anything, masks clothes, it vapourised relitively easily depending on the weather conditions and could form fogs, it was also easy to deliver. |
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