| 1. | The resulting fortifications are known as'lines of contravallation '.
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| 2. | This is a second line of fortifications outside the contravallation, facing away from an enemy fort.
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| 3. | Vauban, in control of the operations, began constructing lines of circumvallation and contravallation surrounding the city.
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| 4. | The Red Army units immediately formed two defensive fronts : a circumvallation facing inward and a contravallation facing outward.
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| 5. | The Lines of Contravallation of Gibraltar were built in 1730, north of the isthmus linking Spain with Gibraltar.
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| 6. | The inner circumvallation,, held in Vercingetorix's forces, while the outer contravallation kept relief from reaching them.
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| 7. | This lines of contravallation ( the trenches nearest to the French position ) included a series of redoubts connected by trenches.
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| 8. | The outermost lines, known as the lines of contravallation, would surround the entire besieging army and protect it from attackers.
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| 9. | The siege lasted from April 19 through to September 6, as Trebonius erected a contravallation to blockade the town by land.
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| 10. | The lines of contravallation, formed of several redoubts, were joined by entrenchments that entirely encircled Kehl and access to the bridges.
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