Answer:
Soldiers had to wear special masks to protect themselves. It replaced the use of air raids and machine guns in battle. It led to mass military desertions on the battlefields. Chemicals such as mustard gas replaced trench warfare.
Explanation:
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Merry Chirstmas
Answer:
Soldiers had to wear special masks to protect themselves. It replaced the use of air raids and machine guns in battle. It led to mass military desertions on the battlefields. Chemicals such as mustard gas replaced trench warfare
Explanation:
