. . "propugnaculis" . . "defensive facility" . . . . . . . . . . . "artillery fort" . . "base" . . . . . . . . . . . . "fortress" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Defensive works" . . . . . "Military fort" . . . . . . . . . . "stronghold" . . . . . . . . . "field fortification" . "Earthworks" . . . . . . . . . . . . . . . . . . . . . . . "Field fortifications" . . . . . . . "wall fortification" . . . . . . . . . . . . . "Kothi" . . . . . . . . . . . . . . "walled fortress" . . . . . . . . . . . . . . . "field works" . . . . . "Fortification" . . . . . . . . . . . . "United States Army Post" . . . . "entrenched" . . . . . . . "fortress walls" . "History of fortification" . . . "fortified city" . . . . . . "wooden fort" . . . . "entrenchments" . . . . . . . . . . . . . . . . . . . . . . . . . "timbering" . . . . . . . . . . . . . . . . . "the art of fortification" . . . . . . . . . . . . . . . . . . . . . . "Fortification (general)" . . . . . . . . . . . . . . . . . . . . . "Fortification#Nomenclature" . . "earthworks" . . . . . . "fortification structure" . . . . . . . . . . . . . . . . . . . "fort." . "military fortress" . . . . . . "fortification#History" . . . . . "fixed fortification warfare" . . . . . . . . . . . . . . . . . . . . "lines of defense" . . . . . . . . . "Fortification" . . . . . . . "Fortazela" . . "military fortifications" . . . . . "Forts" . . . . . "military fort" . . . . "Fortifications" . . . . "fortified structure" . . . . . . . . . . . . . . "flankers" . . . . . . . . . . . "Piquet" . . "forts" . "Fortress Age" . . . . . . . . . . . "fieldwork" . . . . . . "harbor defense facility" . . . "fortified system" . . . . . . "fortified town" . . . . . . . . . . . . . . . "stockade" . . . . . . . . . . "fortification-building" . . . . . . . . . . . . . . . . . . . . . . . . . . . "fortified complex" . . . . . . . . . . . . . . . "fortress-warfare" . . . . . . . . "fortified castles" . . . . "military architecture" . . . . . . . . . . . . . . "castle" . . "earthworks fortification" . . . . . . . . . . . . . . . . . . "fortified walls" . . . . . . . . . . . . . . . . . . . . "stone fortress" . . . . "fortifying" . . . . . . . . . . . . . . . . "works" . . . . . . "encastellated" . . . . . . . . . . . . . . . . "defensive fortifications" . . . . "defensive pieces" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Fort" . "city fortifications" . . . . "defence emplacement" . . "fortifications" . . . . . . . . . . . . . . . . "defensive Lines" . . . . . . . . . "base fortified complex" . . . . . . . . . . . . . . . . . . . "Military earthworks" . . . . . . . . . . . . . . . . "fortified" . . . "post" . . . . . . . . . . "Military fortification" . . "forts constructed during the gunpowder age" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Defensive fort" . . . . . . . . "pass" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "defensive line" . "military forts" . . . "Defence" . "perimeter walls" . . "castellated architecture" . . . . . "redoubt" . . . . . . . "U.S. Army fort" . . . . . . . . "U.S. Military Fort" . . . . . "entrenchment" . . . . . . . . . . . . . . . . . . . . . . . . . . . "tower fortification" . . . "emplacement" . . . . . . . . . . . . . . . . . "fort" . . . . . . "dig in" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "For\u00E7a" . . . . "Fortification#Forts" . . . . . . . . . . . . . . . . . . "fortificated" . . . . . . . . . "defensive position" . "Fortress" . . . . . . . . . . . . . . . . . . . "military fortification" . . "defences" . . . . . . . . . . . . . "fort or fort system" . . . "fortification structures" . . . . . . . . . . . "industrial enrichment" . . . . . . . . . . . . . . . . . . . "fortalice" . . . . "military installation" . . . . . . . . . . . . "field fortifications" . . . . "Fort\u00EDn" . . . "military encampment" . . . . . "fortification" . . . . . . . . . . . . . "fortified towers" . . . . . . . . . . . . . . . . . . . . . . . . . . "fortified wall" . . . . . . . . . . . . . . . . "emplaced" . . . . . . . . . . . . . . "fortified castle" . . . . "defense" . . . . . . . . . . "fortresses" . . . . . . . . . . . . . . . "fortified military position" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "bunker defenses" . . . . . "defence architecture" . . . "strongholds" . . . . "obstacle" . . "fortify" . . . . . . "earthwork battlement mounds" . . . . . . . . . . . . . . . "rendered the walls ineffective" . . "fortifying wall" . . . . . . . . . . . . . . . . . . . . . . . "defensive military" . . . . . . . . . "emplacements" . . . . . "Ft." . . "walled city" . . . . . . "defensive structure" . . . . "castles" . . . . . . . . . "trace" . . . . "lines" . . . . . "earthwork" . . . . . "marine fortresses" . . . . . . . . . . . . . . . .