Kammala jumla mai zuwa: Saboda haka, a matsayin jami'in diflomasiyyar Prussian ne Bernstorff ya halarci taron Aix-la-Chapelle (Oktoba 1818), a ƙarshen wanda ya koma Berlin a matsayin ministan jihar da shugaban sashen harkokin waje. Gudanar da Bernstorff na manufofin Prussian a cikin shekaru da yawa da ya kasance a ofishin an yi hukunci daban-daban. Ya kasance ta hanyar horarwa da halayyar juyin juya hali, kuma an fara shi a cikin sabon aikinsa a matsayin ministan Prussian ta hanyar mai juyin juya hali Ancillon. An zarge shi da sanya takamaiman bukatun Prussia ga manufofin Turai na Metternich da Holy Alliance. Ko wata manufa za ta kasance a cikin dogon lokaci ya yi amfani da Prussia mafi kyau shine batun hasashe. Gaskiya ne cewa Bernstorff ya goyi bayan Dokokin Carlsbad, da Dokar Karshe ta Vienna; shi ma amintaccen bawan Metternich ne a majalisun Laibach, Troppau da Verona. A gefe guda kuma, ya taka muhimmiyar rawa wajen shimfida tushen kungiyar kwastam (Zollverein), wanda aka ƙaddara ya zama tushen mulkin Prussian a Jamus. A cikin goyon bayansa ga aikin Rasha a kan Turkiyya a 1828 ya kuma nuna cewa ba shi da bin bin ra'ayin Metternich. A cikin rikicin na 1830 da ya yi a gaban yakin da ya yi a Berlin ya yi yawa don hana matsalolin da ke cikin
Belgium da Poland daga kawo karshen a duniya Turai conflagration.