Rubuta ci gaba ga wannan sakin layi - Lebeau bai yi nufin rabuwa da Netherlands da Belgium ba, amma juyin juya halin Agusta ya tilasta hannunsa
na shekara ta 1830. Yankin da ya fito ya aike shi zuwa Majalisar Dokoki ta Kasa, kuma ya zama ministan harkokin waje a watan Maris na 1831 a lokacin rikon kwarya na Érasme-Louis Surlet de Chokier. Ta hanyar ba da shawarar zaɓen Leopold na Saxe-Coburg a matsayin "Sarkin Belgians" ya tabbatar da halin kirki daga ɓangaren Burtaniya, amma maido da Netherlands na wani ɓangare na dukes na Limburg da Luxembourg ya haifar da adawa mai zafi ga Yarjejeniyar London ta 1839, kuma an zargi Lebeau da cin amanar bukatun Belgium.