EntityQ91203· pop 19· linked from 417 articlessconceSign in to savesmall protective fortification, such as an earthworkConnectionsAdolf HitlerPersonWolf's LairEntitymilitary trenchEntitywatchtowerEntitystar fortEntitykasbahEntitycoastal defence and fortificationEntityinvestmentEntityMiddle AgesEntitycanalEntitycastleEntityNorthern EuropeEntityRostockEntitypublic domainEntityBlack ForestEntityEnglish Civil WarEntityOperation BarbarossaEntityfortificationEntityguerrilla warfareEntityWorcesterEntityCategoriesFortification (architectural elements)Fortifications by type