But be careful some images captioned Hindenberg line show the second Hindenberg line started between the wars as a response to the Maginot line - it eventually became subsumed into the Siegfried Line (see British musical hall song of 1939 - early 1940 "we'll hang out the washing on the Siegfried line" which didn't happen until 1945. The equivilent of the 1914 "we'll be in Berlin by Christmas")
