5 sept. 1914 - U-Boats
Description:
Germany announced that their U-boats will be apart of unrestricted submarine warfare starting on February 1st. On March 17th, U-boats sank 3 U.S merchant ships. The U.S declared war on germany in 1917.Ajouté au bande de temps:
Date:
5 sept. 1914
Maintenaint
~ Il y a 111 ans