#defensive_structure__defensivestructure__defense a structure used for defense; "the artillery battered down the defenses"
supertype: physical_structure__structure__construction a thing constructed; a complex construction or entity; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons"
subtype: cheval-de-frise__chevaux-de-frise defensive structure consisting of a movable obstacle composed of barbed wire or spikes attached to a wooden frame; used to obstruct cavalry
subtype: munition__fortification defensive structure consisting of walls or mounds built around a stronghold to strengthen it
subtype: bastion.munition projecting part of a rampart or other fortification
subtype: bunker__dugout a fortification of earth; mostly or entirely below ground
subtype: foxhole__fox_hole__foxhole a small dugout with a pit for individual shelter against enemy fire
subtype: funk_hole dugout as a place of safe retreat (when in a funk)
subtype: castle a large building formerly occupied by a ruler and fortified against attack
subtype: defilade the arrangement of defensive fortifications to protect against enemy fire
subtype: entrenchment__intrenchment an entrenched fortification; a position protected by trenches
subtype: retrenchment entrenchment consisting of an additional interior fortification to prolong the defense
subtype: escarp__escarpment__scarp__protective_embankment a steep artificial slope in front of a fortification
subtype: fieldwork a temporary fortification built by troops in the field
subtype: lunette temporary fortification like a detached bastion
subtype: Maginot_Line a fortification built before World War II to protect France's eastern border; initially considered to be impregnable it was easily overrun by the Germans in 1940
subtype: palisade fortification consisting of a strong fence made of stakes driven into the ground
subtype: parapet__breastwork fortification consisting of a low wall
subtype: machicolation a projecting parapet supported by corbels on a medieval castle; has openings through which stones or boiling water could be dropped on an enemy
subtype: Siegfried_line German fortifications facing the French Maginot Line
subtype: stockade fortification consisting of a fence made of a line of stout posts set firmly for defense
subtype: fortress__fort a fortified defensive structure
subtype: alcazar any of various Spanish fortresses or palaces built by the Moors
subtype: Alhambra a palace and fortress built in Granada by the Moslems in the Middle Ages
subtype: martello_tower a circular masonry fort for coastal defence
subtype: Tower_of_London a fortress in London on the Thames; used as a palace and a state prison and now as a museum containing the crown jewels
subtype: line_of_defense__line_of_defence defensive structure consisting of a barrier that can be employed for defense against attack
subtype: abattis__abatti__abatis line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) toward the enemy
subtype: outwork subsidiary defensive structure lying outside the main fortified area; "the outworks of the castle"
subtype: stronghold__fastness a strongly fortified defensive structure
subtype: citadel__bastion a stronghold into which people could go for shelter during a battle
subtype: acropolis__acropoli the citadel in ancient Greek towns
subtype: kremlin citadel of a Russian town
subtype: Kremlin citadel of Moscow, housing the offices of the Russian government
subtype: blockhouse a stronghold that is reinforced for protection from enemy fire; with apertures for defensive fire
subtype: hold.stronghold (archaic) a stronghold
subtype: donjon__keep__dungeon the main tower within the walls of a medieval castle or fortress
subtype: redoubt__sconce a forbidding stronghold
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