Contravallation
Chamber's Twientieth Century Dictionary · 1908 · p. 24
kon-tra-val-ā′shun, n. a fortification built by besiegers about the place invested. [L. contra , opposite, vallāre , ātum , to fortify.]
Bu kavram başka kaynaklarda da geçiyor
A Dictionary of Military Terms (1918)
Everybody's Encyelopedia (1912)
Chandler's Encyclopedia (1898)
Nuttall's Standard Dictionary of the English Language (1890)
A Military Dictionary and Gazetteer (1881)
Dictionary of Science, Literature and Art (1842)
A Military Dictionary (1810)
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