17 mars 1917 - U-Boat

Description:

On the 17 of March, a German U-Boat sunk an American ship. A U-Boat is a German submarine that was used during World War 1 and World War 2. The Germans used U-Boats to bypass the sea blockade by the British.

Info:https://www.britannica.com/technology/U-boat

Pictures: https://www.thelocal.de/20160122/german-wwi-u-boat-found-off-british-coast

https://www.mirror.co.uk/news/world-news/world-war-one-u-boat-11201928