A)a new defensive tactic known as trench warfare
Trench warfare allowed the war to drag on for long periods of time because of the stalemates that ensue from the opposing armies refusing to give up the land under their controls, resulting in high casualties in no man's land.
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Yes becuase they traded nack and forth in a triangle
They mostly faced Russia.
<span>The answer is:
Themistocles</span>
