After Germany's unification in 1871, it emerged as a powerful new nation in central Europe under the leadership of Chancellor Otto von Bismarck. Bismarck pursued policies to strengthen Germany's economy and maintain its dominance through domestic policies targeting Catholics and Socialists, as well as foreign policies aimed at preserving peace in Europe. However, a new Kaiser came to power in 1888 and asked Bismarck to resign, pursuing a more aggressive nationalist and military stance that increased tensions with other European powers.