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jan 31, 1917 - Unrestricted U-boat Warfare Renewal

Description:

Germany announces the renewal of unrestricted submarine warfare in the Atlantic as German torpedo-armed submarines prepare to attack any and all ships, including civilian passenger carriers, said to be sighted in war-zone waters

Added to timeline:

WW1 Main Naval Events

ByOlivia Grover
12 Sep 2018

Date:

jan 31, 1917
Now
~ 107 years ago
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