Tags
- 3
- 7
- A
- Acropolis
- Agger
- Air-raid shelter
- Alcazaba
- Alcázar
- Amba
- American Civil War
- An
- Arrowslit
- Arsenal
- Bailey
- Barbed tape
- Barbed wire
- Barbette
- Barbican
- Barricade
- Bartizan
- Bastion
- Bastion fort
- Battlement
- Battle of Kolb's Farm
- Battle of Plattsburgh
- Battle of the Chateauguay
- Bawn
- Ben Davis
- Bent entrance
- Bergfried
- Berm
- Beyond
- Blast shelter
- Blast wall
- Blockhouse
- Bomb shelter
- Boom
- Border barrier
- Border outpost
- Border Security
- Breastwork
- Bremer wall
- Bridge tower
- British anti-invasion preparations of the Second World War
- Broch
- Bulldozer
- Bunker
- Burh
- Caër
- Caltrop
- Canal
- Caponier
- Cargo ship
- Casemate
- Castellum
- Castle
- Castle town
- Castra
- Castro culture
- Cavalier
- Challenger 2
- Château
- Chemin de ronde
- Chemise
- Chinese city wall
- Circular rampart
- Citadel
- City gate
- Civil defense
- Cloacina
- Coastal artillery
- Coastal defence and fortification
- Cointet-element
- Concertina wire
- Conflict
- Continuity of government
- Corner tower
- Coupure
- Covertway
- Crannog
- Crownwork
- Css grid
- Curtain wall
- Czech hedgehog
- Defense line
- Defensive fighting position
- Defensive wall
- Disappearing gun
- Ditch
- Dragon's teeth
- Drawbridge
- Dun
- Dungeon
- Dzong architecture
- Electric fence
- Embrasure
- Embrun, Hautes-Alpes
- Enceinte
- Encyclopædia Britannica Eleventh Edition
- Entrenchment
- Fallout shelter
- Festung
- Fire
- Fire support base
- Flak tower
- Flanking tower
- Fleche
- Forest gardening
- Forest gardens
- Fortification
- Fortified church
- Fortified gateway
- Fortified house
- Fortified tower
- Forward operating base
- Four
- Front Populaire
- Gabion
- Garden
- Gatehouse
- Gate tower
- Glacis
- Gord
- Gorge
- Grappling Hook
- Gregory of Tours
- Guard tower
- Gunpowder magazine
- Gun turret
- Gusuku
- Half tower
- Hardened aircraft shelter
- Hesco bastion
- Hill castle
- Hillfort
- Hilltop castle
- Him
- History of New England
- Hoarding
- Hornwork
- Hugh Chisholm
- Imperial castle
- Infantry
- Inner bailey
- International
- International conflict
- Irrigation
- Island castle
- Jagdschloss
- Japanese castle
- Jurmo
- Kabal
- Kaiserpfalz
- Kasbah
- Keep
- Kremlin
- Ksar
- Land mine
- Landwehr
- Limés
- Lombards
- Loophole
- L-plan castle
- Lunette
- Lustschloss
- Machicolation
- Magazine
- Magnus Maximus
- Martello tower
- Masonry
- Medieval fortification
- Merlon
- Military base
- Missile launch facility
- Moat
- Modicana
- Motte-and-bailey castle
- Murder-hole
- National Wind
- Need
- Neuss
- New
- New Hampshire
- New York City Police Department corruption and misconduct
- No
- Nuraghe
- Obstacle
- Oppidum
- Ostrog
- Outer bailey
- Outpost
- Outwork
- Palanka
- Palas
- Palestine
- Palisade
- Picket
- Pillbox
- Place
- Plight
- Polyculture
- Portcullis
- Posad
- Postern
- Powder Tower
- Presidio
- Promontory fort
- Public domain
- Punji stick
- Qalat
- Quadrangular castle
- Ragusano
- Rampart
- Ravelin
- Raw milk
- Redan
- Redoubt
- Reduit
- Refuge castle
- Remove
- Research
- Retrenchment
- Revetment
- Ribat
- Ricetto
- Ringfort
- Ringwork
- Rocca
- Rock Castle
- Roman Empire
- Rope
- Roundel
- Saddell
- Sally port
- Sandbag
- Sangar
- Schanze
- Schloss
- Schwedenschanze
- Sconce
- Sentry gun
- Sergiyev Posad
- Shell keep
- Shield wall
- Siege
- Siege engine
- Some
- Spider hole
- Spur castle
- Station
- Stockade
- Stonewall
- Submarine pen
- Subterranean warfare
- Sud Du
- Sudis
- Tank
- Tenaille
- Thomas Gage
- Ties
- Tim Bayliss
- Tower House
- Trench
- Trench warfare
- Tula, Russia
- Tunnel warfare
- Turret
- Underground hangar
- United States Army
- United States Marine Corps
- Urban guerrilla warfare
- Urban warfare
- Vallum
- Vedette
- Vitrified fort
- Wagon fort
- Watchtower
- Water castle
- West Roxbury
- What
- Why
- Wikipedia
- Wire
- Wire obstacle
- World War II
- Yagura
- Yett
- Zurich
- Zwinger