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Congress of Vienna
In 1815, at congress of vienna created German Confederation, which united 39 countries that made up Germany. -
King of Prussia
In 1861, Wilhelm became king of Prussia, and Junkers( a conservative and wealthy class) suported him. -
Otto von Bismarck
In 1862 Wilhelm appointed him as prime minister. Bismarck decided that he would rule without the consent of parliament and defy the budget they had set for him, because the Prussian parliament refused to him and Wilhelm I's desires.