Ocean liner Lusitania.
a group of German uboats that hunted Allied and US ships
The Germans then threatened to use only Uboats for war and blew up a few ships.
It sank up to 2,779 ships in world war 2
World War 1.
items were in short supply for Britain because all their cargo ships bringing food and other things in from the US were torpeoded and sunk by the German UBoats
the u boat is a submarine. it was made to hit and sink British ships
Wilson entered WWI because the German Uboats were destroying Americas ships. Also the Germans sent the Zimmerman letter to Mexico to ask them to join the war. If they won Mexico would receive all the land in America.
Yes there were civilian passenger ships that traveled across the Atlantic Ocean during World War 2. Unfortunately during this time there were many civilian passenger ships that never reached their destinations due to disaster striking during their sail.
the Germans used uboats and kept torpedoing cargo ships so the inhabitants didn't get the supplies they needed
The US transported supplies to the Allies using merchant and passenger ships carrying United States citizens. This was why the German U-boats attacked these ships and were one of the reasons the US entered the war.
There was no formal pledge not to sink civilian ships, however the concept of neutrality was accepted and agreed by all the western powers. The illusion of neutrality was shattered when a German submarines sank the unarmed passenger liner Lusitania.
We entered World War 1 because of a German submarine attack on U.S. merchant ships in 1917.