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| | Poison gas in World War I - Wikipedia, the free encyclopedia |
 | | Gas never reproduced the dramatic success of 22 April 1915; however, it became a standard weapon which, combined with conventional artillery, was used to support most attacks in the later stages of the war. |
 | | The mustard gas with which the British hoped to repel an invasion of the United Kingdom in 1940 was never needed[10][11], and a fear that the allies also had nerve agents[12] prevented their deployment by Germany. |
 | | Gas shells could be delivered without warning, especially the clear, nearly odourless phosgene — there are numerous accounts of gas shells, landing with a "plop" rather than exploding, being initially dismissed as dud HE or shrapnel shells, giving the gas time to work before the soldiers were alerted and took precautions. |
| en.wikipedia.org /wiki/Poison_gas_in_World_War_I (4949 words) |
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