How did Otto von Bismarck’s foreign policy help preserve peace in Europe from 1870 to 1890?

After 1870, Otto von Bismarck viewed his primary task as promoting peace to ensure the newly unified German Empire would be accepted as a stable European power rather than an interloper. His foreign policy focused on two major threats: the potential for a war of revenge from France and the risk of a conflict between Austria-Hungary and Russia over the Balkans.12

Bismarck’s strategy relied on complex, often overlapping alliances to prevent the formation of an anti-German coalition:

• Diplomatic Mediation: At the Congress of Berlin in 1878, he acted as an honest broker to resolve tensions following the Russo-Turkish War, successfully moderating Russian gains to prevent a wider conflict.132
• Alliance Systems: He secured Germany’s position through the Dual Alliance with Austria-Hungary (1879) and the Triple Alliance with Italy, while simultaneously reviving the Three Emperors’ League to maintain influence in St. Petersburg.142
• Crisis Management: When Balkan tensions caused the league to collapse, he negotiated the secret Reinsurance Treaty (1887) with Russia to ensure neutrality, effectively isolating France and preventing a two-front war.125

By positioning Germany as a satiated power, Bismarck successfully maintained European stability until his resignation in 1890.12