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feb 1, 1915 - U-boats are introduced

Description:

U-boats are another word for submarine, or "undersea boat". The German Navy were the first to utilize this new technology. They used it to sink various ships, including merchant ships holding civilians.

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WW1 timeline

ByAriel Chiam
14 Dec 2018
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434

Date:

feb 1, 1915
Now
~ 110 years ago

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