4 févr. 1915 - Germany declares submarine blockade of Great Britain
Description:
In retaliation against British ships cutting off Germany’s supplies, Germany formed a war zone around Britain and sunk merchant ships with its U-boats. This upset neutral countries like the United States (TheWorldWar.org).Ajouté au bande de temps:
Date:
4 févr. 1915
Maintenaint
~ Il y a 110 ans