They knew that at any moment, German U-boats could descend upon them. Disaster struck at 4:15 p.m. The German UB-64 launched a torpedo that hit the vessel's starboard side and caused an explosion.

Germany changed the tactic during WWI via unrestricted submarine warfare, which meant that German U-boats could attack without warning any vessel it came across. Germany sank the civilian vessel ...

A 15ft (4.6m) sculpture of a German U-boat has been created on an Essex beach to mark 100 years since 160 boats were surrendered there at the end of World War One. The U-boats, stretching in ...

When German U-boat Commander Walther Schwieger ordered a torpedo strike on the Lusitania, he didn't know it would be the shot that eventually led the U.S. into WWI. But it wasn't a mistake ...

U-boats were very vulnerable ... did its awesome threat actually save lives? WW1: Why was the first German defeat in Africa? documentWW1: Why was the first German defeat in Africa?

British ships were blockading German ports, but the U-boat was a new and terrifying way ... Kitchener's iconic recruitment PR campaign of WW1. Crushing defeat in the first battle of WW1.