The study, published last week by Aston University researchers in the journal i-Perception, recreated one of the few solid ...

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 reanalysis of a 1919 study suggests that a separate illusion, the "horizon effect," played a bigger role in warping visual ...

During WWII, Germany built 1,162 destructive "U-boats," which is short for the German word "Unterseeboot," or undersea boat. By April 1917, 430 Allied and civilian vessels were sunk by German U-boats.

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.

The sinking of the passenger liner Lusitania by a German U-boat helped to shatter that hope. Woodrow Wilson, 1918. Courtesy: Library of Congress Wilson demanded an apology from Germany and ...