4 Feb 1915 Jahr - Germany begins a policy of unrestricted submarine warfare.

Beschreibung:

As the war went on, Germany had declared the area around the British Isles a war zone, in which all ships, either military or merchant, would be attacked and destroyed by German U-boats. Germany had come up with this tactic to scare off any ships trading with Britain, cutting off some of Great Britain’s supply lines.

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