AP European History
'Blood and Iron' is a phrase coined by Otto von Bismarck, referring to the idea that strong military force and the willingness to use it are essential for the unification of Germany. This concept highlighted Bismarck's belief in the necessity of a powerful army and realpolitik as means to achieve national goals, while also underscoring the tensions that arose between European nations as they maneuvered for power during the unification process.