The Fort near Hoofddorp dates back to 1904. The most striking feature of the fortress is its second level and the related front caponier, a low frontal expansion. The additional floor was needed due to the limited space. As a result, the moat was partly distracted from the defenders’ view. The armoured steel caponier supplied by Skoda is a unique element of the Defence Line.
The Fort near Hoofddorp served as a defence for the accesses formed by the Hoofdvaart and the roads running on both sides of this canal. The main defence line of the ‘Stelling’ cut right through the Haarlemmermeer Polder and was formed by the Geniedijk, a dike constructed for the army in 1891-1894, and the forts near Aalsmeer, Hoofddorp and Vijfhuizen.