American Civil War, a revetment is defined as a "retaining wall constructed to support the interior slope of a parapet. Made of logs, wood planks, fence rails, fascines, gabions, hurdles, sods, or stones, the revetment provided additional protection from enemy fire, and, most importantly, kept the interior slope nearly vertical. Stone revetments commonly survive. A few log revetments have been preserved due to high resin pine or cypress and porous sandy soils. After an entrenchment was abandoned, many log or rail revetments were scavenged for other uses, causing the interior slope to slump more quickly. An interior slope will appear more vertical if the parapet eroded with the revetment still in place." See also References External links Fortifications Pisa Revetment Gabion Revetment River and levee management EPA - River Bend Project Levee and Revetment Routine Maintenance US DOT - Design of Riprap Revetment Architectural elements Coastal construction Coastal engineering Riparian zone Environmental engineering Ecological restoration Limnology Fortification (architectural elements) Rivers