Vallation

• (n.) A rampart or intrenchment.
Found on http://thinkexist.com/dictionary/meaning/vallation/

Vallation

Val┬Ěla'tion noun [ Latin vallatio , from vallare to surround with a rampart, from vallum rampart. See Wall , noun ] A rampart or intrenchment.
Found on http://www.encyclo.co.uk/webster/V/4

vallation

ridge or bank of earth used as fortification
Found on http://phrontistery.info/v.html
No exact match found