They knew that at any moment, German U-boats could descend upon them ... up along the coast of north Wales almost a month after the sinking. They used a technique called numerical modeling ...

By the fall of 1915, U-boats were sinking an average of 100,000 ... Led by “eager and aggressive” young lieutenants, U-boat crews operated under the German tradition of Auftragstaktik ...

A port official said he was told the North Sea collision produced "a massive fireball" and the cargo ship's owner said one ...

The ship was transporting supplies and soldiers along the coast when it was torpedoed by German U-boat U-861 on the night of June 19, 1944. The wreck was first reported 14 years ago but was ...

By the war’s end in November 1918, these mysterious decoys had fought around 70 engagements, sinking no more ... young lieutenants, U-boat crews operated under the German tradition of ...