<prompt> Qedela le nkulumo elandelayo: Lapho iBelgium ithola inkululeko yayo eNetherlands ngo-1830, yathola njengefa imigqa emine yezinqaba zikaNapoleon ezibizwa ngokuthi iWellington Barrier umbuso owawungakwazi futhi owawungafuni ukuzigcina. Lezinqaba zabhekana neFrance, isizwe iBelgium  <response>: yayilwele ukuzimela kwayo eceleni kwayo. Ukuhlakazwa kwezinqaba zaseWellington Barrier kwaqala ngo-1839, kodwa ngemva kwezinguquko zika-1848 nokumiswa koMbuso Wesibili waseFrance ngo-1851, iBelgium yabhekana nokungenwa yiFrance. Abaholi baseBelgium bafuna isu elisha lokuzivikela futhi balwa nemizwa yabantu yokulwa nempi noma ukuphikisana nezintshisekelo zezentengiselwano maqondana nezinqaba ezikhona, kodwa bahlala ngo-1859 ngohlelo olwalukhuthazwa ngumphathi jikelele waseBelgium. Kusukela ngo-1847, uChazal wacela ukuba i-Antwerp iqiniswe futhi yandiswe ibe yiNational Redoubt njengenqaba yebutho laseBelgium. Umsebenzi wokwakha i-National Redoubt wanikezwa umuntu owayevikelwe uChazal, uKaputeni Henri Alexis Brialmont. IBrialmont yaqeda i-National Redoubt ngo-1868, kodwa intuthuko kwezobuchwepheshe kwezokudubula kanye nolunye ushintsho esimweni sezombangazwe saseYurophu kwaphinde kwenza isu lokuzivikela laseBelgium lingafaneleki. 