He was the chancellor of Prussia. He became chancellor of Germany who had total power, and lead Prussia to victory against Austria and France. He was responsible for the unification of the German empire! Also he was incharge of the Berlin Conference.
“Blood And Iron”: A policy encouraged and somewhat forced by Otto von Bismarck; using war to unite German states under one rule. Bismarck believed that "blood and iron" were needed in a country to have success and leadership, and could not be achieved by speech and representative democracy.
Blood: represented the military/fighting while the
Iron: represented the industry of Germany.
Realpolitick: Politics developed by Bismarck that made decisions that were practical rather than moral, where there was no legislature. Decisions were based off of what was best for the country, rather than the people. The idea of "Power over principles".
Prussia: A former state of Germany that was ruled by Bismarck. Prussia united Germany by winning three wars against France, Denmark and Austria.