Nyora kupfuurira kweiyi ndima - Pakazosvika 1810 Boyen akanga ava Mutungamiriri weKabineti yeMasoja. Mukugadziriswazve kweuto rePrussian akashanda semubatsiri anoshingaira waScharnhorst, asi mushure mekupedzisa mubatanidzwa pakati pePrussian neFrance muna 1812 akasiya basa rake semukuru uye akashanyira Vienna neSt Petersburg. Zviitiko zva1813 zvakamona achidanazve basa rePrussian: semukuru wemauto akaperekedza uto reRussia kubva kunzvimbo yaro muKalisz kuenda kuSaxony. Pashure peHondo yeLützen
(2 May 1813) akanga ane mutoro wevarindi vemuganhu uye pakupedzisira kudzivirirwa kweBerlin. Asi mukati mokuregererwa kwehondo Mambo Frederick William III akamutumidza kuti Mukuru Mukuru weVashandi Vemauto weChitatu. Saizvozvowo, Boyen akapinda muhondo nemakakatanwa e1813 na1814 uye akawana kukwidziridzwa kune mukuru mukuru.