31 gen 1917 anni - Germans Unleash U-Boats
Descrizione:
INFO SOURCE:https://www.history.com/this-day-in-history/germans-unleash-u-boats
Germany announced their resumption of submarine warfare, attacking all ships in the Atlantic. The Germans used U-Boats. U-Boats were submarines that were the most sophisticated at the time, the Germans most dangerous weapon.
2 visuals: Image and video
PHOTO SOURCE:
https://www.britannica.com/technology/U-boat
VIDEO SOURCE:
https://www.youtube.com/watch?v=RCrzaC4aLPg
Aggiunto al nastro di tempo:
Data:
31 gen 1917 anni
Adesso
~ 108 years ago