1. 
   Neck Ditch
   Ditch cutting across a neck of land, to hinder an enemy's advance.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   Neck ditch
   A neck ditch (Halsgraben), sometimes called a throat ditch, is a dry moat that does not fully surround a castle, but only bars the side that is not protected by natural obstacles. It is often an important element in the defensive system of hill castles, especially in Germany and other parts of Cent...
   Found op http://en.wikipedia.org/wiki/Neck_ditch
   
   

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