The attackers are further frustrated by a deep ditch situated between the glacis and the wall itself, bounded on either side by the smooth, masoned scarp and counterscarp.
More generally, the term glacis can denote any slope, natural or artificial, which fulfils the above requirements. The etymology of this French word suggests a slope made dangerous with ice, hence the relationship with glacier.
Hard shell: to improve survivability armoured fighting vehicles will get heavier before they get lighter. The US Army's claim that its 70-tonne M1 Abrams is the 'most survivable main battle tank in the world' is being tested each day in Iraq. Yet the army has suffered more armoured vehicle losses in the continuing 'stabilisation' phase of Operation Iraqi Freedom than in the six-week 'combat' phase.(Vehicles: aramour)
Oct 01, 2005; The combination of lethality, mobility and protection provided by the M1 tank and M2/M3 Bradley fighting vehicle proved as...