1879年10月建立的德奥同盟是在德俄关系恶化的情况下两国签订的双边条约。德奥同盟形成的根本原因是普法战争造成的欧洲均势失衡,各欧洲大国希望通过结盟来维持均势;直接原因是近东危机造成德奥关系破裂和德俄关系恶化。 The DIO alliance established in October 1879 is a bilateral treaty signed between the two countries under the deteriorating relations between Germany and Russia. The fundamental reason for the formation of the alliance of Germany and Democrats is the imbalance of the European balance of power caused by the Franco-Prussian war and the desire of all European powers to maintain their balance of power through alliances. The immediate cause is the rupture of the relations between Germany and Austria and the deteriorating relations between Germany and Russia in the crisis in the Near East.