military defense
acropolis
abatis
blockhouse
bunker
bastion
battlement
casemate
citadel
communicationcenter
combatoutpost
garrison
jointoperationscenter
jointtacticalcoordinationcenter
landmine
landfort
megafort
moat
perimeterfortification
palisade
presidio
redoubt
rampart
stockade
shieldwall
sentrypost
scudbunker
watchtower