Contravallation

What is Contravallation?

Contravallation definition and meaning on Dictionary terms:
noun Fortification.
a more or less continuous chain of redoubts and breastworks raised by besiegers outside the line of circumvallation of a besieged place to protect the besiegers from attacks from the outside, as by a relieving force.

 

reference: https://www.dictionary.com/browse/contravallation

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