How did Otto von Bismarck use foreign policy to weaken liberal opposition in Prussia?

Otto von Bismarck strategically utilized foreign policy to undermine liberal opposition in Prussia by linking his authoritarian domestic agenda to the popular goal of German national unification.12

When Bismarck became prime minister in 1862, he faced a deadlock with the liberal-dominated Chamber of Deputies over military reforms and the state budget. To bypass this resistance, he pursued a series of successful military campaigns—the German-Danish War, the Seven Weeks’ War against Austria, and the Franco-German War—which transformed Prussia’s international standing.21

These victories served two purposes:
* Shifting Public Sentiment: The success of Prussian arms generated widespread nationalistic fervor, causing many liberals to prioritize German unity over their previous insistence on parliamentary sovereignty.13
* Dividing the Opposition: Following the victory over Austria in 1866, Bismarck offered a Bill of Indemnity to retroactively legalize his budget actions. This effectively split the liberal movement; moderate liberals accepted the compromise to influence future policy, leading to the formation of the National Liberal Party, while the remaining opposition was significantly weakened.13

By satisfying middle-class demands for economic and national unity, Bismarck successfully reconciled many former opponents to his leadership.13