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No, trench warfare was not widely used in World War II as it was in World War I.
World War 1 was known for its long and dangerous trench warfare and for extended artillery bombardments.
trench
"The World war 1 trench was the biggest I have found" or "The trench in the ocean was the biggest in the world"
World War One.
Yes.
Yes.
No, trench foot was first noted by Napoleon's army in 1812. It was made more well known during the trench warfares of World War I, but it was not new at that time.
Yes.
trench foot, trench fever, tetanus
Yes, World War II did involve trench warfare, but it was not as prevalent as it was in World War I. Trenches were still used in some battles, but the war also saw the use of new tactics and technologies that reduced the reliance on trench warfare.
World War I was fought by trench warfare.