Who was the first Chancellor of a united Germany in 1871?

Otto von Bismarck served as the first Chancellor of a united Germany in 1871 because he played a crucial role in the unification of the German states and the formation of the German Empire. Bismarck skillfully orchestrated a series of military victories and diplomatic maneuvers, such as the Austro-Prussian and Franco-Prussian Wars, to unify the various German states under the leadership of Prussia. As Chancellor, he implemented policies that consolidated and strengthened the newly formed German Empire, making him instrumental in the establishment of a united Germany.