Which of the kingdoms led the unification of Germany?

The Kingdom of Prussia played a pivotal role in the unification of Germany during the 19th century. Under the leadership of Otto Von Bismarck, Prussia employed a combination of diplomacy and military strategy, notably through the Austro-Prussian War in 1866 and the Franco-Prussian War in 1870-1871. These conflicts helped to rally the German states under Prussian leadership, culminating in the proclamation of the German Empire in 1871. Thus, Prussia emerged as the dominant force in the unification process.