7 h 55 m, 22 abr 1915 año - Invention of chemical warfar
Descripción:
Chemical warfare is a type of warfare that include toxic chemicals and gas. It was used to weaken the battle field before a battle.
1.https://owlcation.com/humanities/The-Gruesome-Military-Tactics-of-World-War-I
2.https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRUBYPHnHaSBocR2-EXi5j31Z8x2UpV1E9_u0QnMiRKuwv88jX9
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fecha:
7 h 55 m, 22 abr 1915 año
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~ 109 years ago
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