Three Emperors´ League, formed 1881 between Austria-Hungary, Russia and the German Empire on the initiative of Bismarck. It aimed at securing neutrality for the three allies in cases of aggression from a fourth party and acknowledging their respective interests in the Balkans. Despite a renewal of the agreement in 1884, the League failed because of the differences between Austria-Hungary and Russia over the "Battenberg affair" (1885-1887).
Literature#S. Zulinski, Das Dreikaiserbuendnis von 1881, 1983.