1) Outer slope of ditch 
A scarp and a counterscarp are the inner and outer sides of a ditch or moat used in fortifications. Attackers (if they have not bridged the ditch) must descend the counterscarp and ascend the scarp. In permanent fortifications the scarp and counterscarp may be encased in stone. In less permanent fortifications, the counterscarp may be lined with p...
narrow earth band on the outer wall of a defensive ditch
(from the article `military technology`) ...the scarp, or main fortress wall, now protected from artillery fire by the glacis, was faced with brick or stone for ease of maintenance; the ...
outer slope of a defensive ditch
Outer slope of ditch.
Outer slope of ditch.
Vertical face of a ditch around a fort on the outer side.
outer slope or wall of a ditch
Outer face of a ditch
In fortification, a counterscarp is the exterior slope of the ditch towards the field, in contradistinction to the slope next to the rampart, which is named the scarp or escarp.
outer slope or wall of a ditch
the exterior slope or wall of the ditch of a fort, supporting the covered way. See diag. under