What did Otto Von Bismarck follow a policy of?

Otto Von Bismarck followed a policy of Realpolitik, which emphasized pragmatic and strategic decision-making over ideological considerations. His approach focused on the practical needs of the state, using diplomacy, manipulation, and military power to achieve political goals, particularly in unifying Germany. Bismarck's policies included careful alliances and wars that ultimately led to the establishment of the German Empire in 1871.