In case of what country's attack was the origins of the Central Powers?
Central Powers:  The Powers' origin was the alliance of Germany and Austria-Hungary in 1879. Dual Alliance (1879): The Dual Alliance was a defensive alliance between Germany and Austria-Hungary, which was created by treaty on 7 October 1879 as part of Bismarck's system of alliances to prevent or limit war. Dual Alliance (1879):  The two powers promised each other support in case of attack by Russia.
i don't know