War between Austria and Prussia over two smaller German states?The Seven Weeks War
The war between Austria and Prussia, known as the Seven Weeks' War, occurred in 1866 and was fueled by competition for dominance in the German states. Otto von Bismarck's strategic provocations led to Austria declaring war on Prussia, which resulted in a quick and decisive Prussian victory. This conflict significantly shifted the balance of power in Germany and paved the way for future unification efforts under Prussian leadership.
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