Rubuta ci gaba ga wannan sakin layi - A 1806, a lokacin yakin na hudu Coalition
, Grawert ya umurci rundunar soji kuma ya shiga cikin yakin Jena. Bayan Yarjejeniyar Tilsit, an nada shi Gwamna Janar na Silesia. A wannan matsayin Grawert ya sami nasarar girmama shugabannin Faransa da Napoleon kansa. Daga baya ya nemi shi a matsayin kwamandan Sojojin Taimakawa na Prussian wanda, a matsayin wani ɓangare na Jacques MacDonald's X Corps na Grande Armee, ya shiga cikin mamayewar Faransa na Rasha a 1812. A farkon yakin Grawert ya umurci rundunarsa a Ekau. A can ya fadi daga dokinsa kuma ya karya ƙafafunsa, ya tilasta masa ya ba da umurni ga Lieutenant General Ludwig Yorck.