Mezue ahịrịokwu na-esonụ: Knobelsdorff, onye bụbu onye isi ndị agha ịnyịnya, natara onyinye na Silesian Wars ma bụrụ onye isi nke ndị agha ụkwụ "Brunswick-Bevern" na "von Schwarz". N'afọ 1776, e mere ya onye isi nke ndị agha na-agba ọsọ "Stojentin", nke dị na Stendal. N'oge Agha nke Bavarian Succession ọ pụtara ìhè dị ka onye isi ndị agha na ndị agha nke Prince Henry. N'agha ahụ a lụrụ megide Holland na 1787, o du ndị agha nọ n'akụkụ aka ekpe. Onyeisi ndị agha n'oge ahụ bụ Ferdinand, Duke nke Brunswick. Mgbe ọrịa ahụ malitere
agha megide France na 1792, ọ nọgidere na Stendal, ebe ndị agha ya sonyeere ndị agha nke Duke nke Brunswick. Otú ọ dị, mgbe ọnọdụ agha ka njọ na Duke dara ọrịa ma hapụ ndị agha jikọrọ aka na March 1793; Knobelsdorff weghaara dịka onye isi ndị agha Prussia. N'oge ọkọchị nke afọ 1793, e buliri Knobelsdorff n'ọkwá ịbụ Ọchịagha Ndị Agha Ụgbọ Mmiri ma nata otuto pụrụ iche site n'aka eze. Onye na-agakarị na nke ikpeazụ, a kwalitere agadi ahụ n'ọkwa Generalfeldmarschall na 1798 ma ka na-esonye na mmegharị na Potsdam na 1799.