He was appointed ambassador to Russia early in his career, and his friendship with Albrecht von Roon kept him informed of domestic affairs.  A deeply rooted conservative, his popularity came as the result of military conflicts, the first of which was a succession crisis upon the death of Frederick VII of Denmark that led to the annexation of Schleswig-Holstein after he orchestrated the defeat of Austria.  In his most famous post, he is noted for the practice of Realpolit
He was appointed ambassador to Russia early in his career, and his friendship with Albrecht von Roon kept him informed of domestic affairs.  A deeply rooted conservative, his popularity came as the result of military conflicts, the first of which was a succession crisis upon the death of Frederick VII of Denmark that led to the annexation of Schleswig-Holstein after he orchestrated the defeat of Austria.  In his most famous post, he is noted for the practice of Realpolitik and implementing the Kulturkampf.  Using the Ems dispatch, he provoked France into war, facilitating the unification of Germany. Becoming chancellor under Kaiser Wilhelm I, name this famed "iron chancellor" of Germany.
He was appointed ambassador to Russia early in his career, and his friendship with Albrecht von Roon kept him informed of domestic affairs.  
Otto von {Bismarck}