三帝同盟
Russia had previously been a member of the League of the Three Emperors, an alliance in 1873 with Austria-Hungary and Germany. The alliance was part of German Chancellor Otto von Bismarck′s plan to isolate France diplomatically; he feared that France's revanchist aspirations might lead it to attempt to regain its 1871 losses stemming from the Franco-Prussian War. The alliance also served to oppose such socialist movements as the First International, which the conservative rulers found unsettling.