They knew that at any moment, German U-boats could descend upon them ... The day after the attack, Simmonds gave an approximate location of where the ship went down in his report, but the exact ...

The dazzle paint scheme originated around 1917 as a direct response to unyielding German U-boat attacks. German ships famously adopted an “unrestricted submarine war” policy at the start of ...

This is a u-boat officers ... leather hanger. The German submarine caused havoc with alied shipping for the greater part of the war which began in 1939 with the infamous attack on Royal Oak ...

U-boat from which codebooks and valuable cryptographic materials were recovered before sinking, facilitating, in late 1942, the second major Allied breakthrough in reading German U-boat ...