Germany and Austria-Hungary sign the "Twofold Covenant" and create the Dual Alliance.

Dual Alliance (1879)

Alliance between Germany and Austria-Hungary

The Dual Alliance was a defensive alliance between Germany and Austria-Hungary, which was created by treaty on October 7, 1879, as part of Germany's Otto von Bismarck's system of alliances to prevent or limit war. The two powers promised each other support in case of attack by…