Counterscarp is that side of the ditch of a fort which is nearest to the besiegers; the other side being called the escarp or scarp.
Counterscarp
Chambers's Encyclopaedia, Volume 3: Catarrh to Dion, p. 521
Source scan(s): p. 0532
Counterscarp is that side of the ditch of a fort which is nearest to the besiegers; the other side being called the escarp or scarp.