The success of this intervention, which was the practical realisation of a plan very characteristic of Hertzberg, marks the culminating point in his career. But the opposition between him and the new king, which had already appeared at the time of the conclusion of the triple alliance between the Netherlands, England and Prussia, became more marked in the following years, when Hertzberg, relying upon this alliance, and in conscious imitation of Frederick II's policy at the time of the first partition of Poland, sought to take advantage of the entanglement of Austria with Russia in the war with Turkey to secure for Prussia an extension of territory by diplomatic intervention.