feb 4, 1915 - Germany begins a policy of unrestricted submarine warfare.
Description:
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.Added to timeline:
Date:
feb 4, 1915
Now
~ 111 years ago