What did Otto van Bismarck use to promote Germany unification?

What piece treaty formally accepted the division of Christianity in Germany? Why is the great schism of 1054 important? What year did the mongols arrive in kashgar? What was one of the Crusades' important long-term effects? What is the definition of cronology? Who is nero's mother? How was cloth made in 1500? When did mercantilism start and end? What Describes a difference between Eastern and Western Europe following World War 2? Why did the kings and nobles of Europe agree to fight in the crusades? Which crusades was the only one to achieve real success? What company was the first to trade stock on an open exchange in the early 1600s? Where did wearing your jeans below your waist originate? What century is 1795 AD? In Which time period means a rebirth? What did Medieval Scouts and Foresters look like And what were their jobs as well as their rank in society? Why did the crusades result in cultural diffusion? What was the cold war who was it between and what happened? What is the history of stock investing? What is the single reason of crusdes?

What did Otto van Bismarck use to promote Germany unification?