Rubuta ci gaba don wannan sakin layi - A cikin shekarun baya, na mulkin Frederick the Great, Hertzberg ya taka muhimmiyar rawa a manufofin kasashen waje. A cikin 1772, a cikin wani tarihin da ya dogara da cikakken nazarin tarihi, ya kare da'awar Prussian ga wasu lardunan Poland. Ya kuma yi nasara a matsayin mai talla a cikin tattaunawar game da batun batun Bavarian.
(1778) da waɗanda ke zaman lafiya na Teschen (1779). A cikin 1780 ya kasa kare bukatun Prussian a zaben bishop na Münster. A cikin 1784 ya fito da littafin tarihin Hertzberg wanda ya ƙunshi cikakken nazarin Fürstenbund. Ya yi gwagwarmayar wannan sabon kirkirar Frederick Mai Girma da farko tare da ra'ayin sake fasalin mulkin mallaka, kodayake ra'ayin haɗin kan Jamusawa har yanzu yana da nisa daga tunaninsa.