The creator of poisonous gas in grenade form is unknown, but it first came into use around the 1500's. Grenades were used by either removing a safety pin from the top of a homemade grenade or the cylindrical grenade is ignited by striking the grenade like a match before promptly dispatched skywards. The chlorine gas was released from a cylinder by turning a cock, and the phosgene and mustard gas were delivered using cylinders and artillery. This weaponry impacted WWI by giving countries reason to further advance their defense mechanisms to save their soldiers from the poisonous gases. Overall, poisonous gases had a great impact not only on WWI but also on modern weaponry by motivating other countries to make advances in terms of defense strategies as well as fighting with gases.
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