How are Otto von Bismarck and Camillo di Cavour similar?

All three of these men led the unification of their respective homelands (Bismarck - Germany, Cavour - Italy, Meiji - Japan) in the mid-to-late 1800s and the industrialization and modernization of their countries. The unifications in all cases required impressive military tactics and diplomatic acumen. These leaders also thrust their countries into the imperialist land grab in Africa, Asia, and Oceania, trying to get any territories not already taken by UK, France, Portugal, Netherlands, or Belgium.