The other covered the siege, and secured himself from the allies by lines of contravallation. |
On the 20th I continued working on the lines of contravallation, under a dreadful fire from the place. |
The old system of intrenched camps and lines of contravallation is unsuited to the spirit of modern warfare. |
Before help arrived, Anseric had had time to kill or put to flight all who were guarding the contravallation. |