They all entered Prussian diplomatic or military service , where they achieved high rank .
Apparently these many years in Berlin completely assimilated his three sons ( born in 1819 , 1821 and 1827 ) to their new environment .
sons all entered Prussian diplomatic or military service , where sons achieved high rank .
Apparently these many years in Berlin completely assimilated his three sons ( born in 1819 , 1821 and 1827 ) to their new environment .