 Nyora kupfuurira kweiyi ndima - Muna 1815, William akasimudzirwa kuva mukuru ndokutungamirira battalion ye1. Garderegiment. Akarwa pasi paGebhard Leberecht von Blücher paHondo dzeLignyuye Waterloo. Akava mumiririri wehurumende, achibatanidzwa mumishinari pashure pa 1815. William aiva munununa waMambokadzi Alexandra Feodorovna weRussia akaberekwa Charlotte wePrussia. Muna 1817 akaperekedza hanzvadzi yake kuSaint Petersburg paakaroorwa naMambo Nicholas I weRussia. 