Rückversicherungsvertrag
The practical details of these alliances were limited since their primary purpose was to ensure cooperation between the three Imperial Powers and to isolate France. Attempts by Britain in 1880 to resolve colonial tensions with Russia and diplomatic moves by France led to Bismarck reforming the League in 1881. When the League finally lapsed in 1887, it was replaced by the Reinsurance Treaty, a secret agreement between Germany and Russia to remain neutral if either were attacked by France or Austria-Hungary.