In case of what country's attack was the origins of the Central Powers?
Central Powers: The Central Powers (German: "Mittelmächte" ; Hungarian: "Központi hatalmak" ; Turkish: "İttifak Devletleri" or "Bağlaşma Devletleri" ; Bulgarian: Централни сили "Tsentralni sili" ), consisting of Germany, Austria-Hungary , the Ottoman Empire and Bulgaria – hence also known as the Quadruple Alliance (German: "Vierbund" ) – was one of the two main factions during World War I (1914–18). Central Powers:  The Powers' origin was the alliance of Germany and Austria-Hungary in 1879. Dual Alliance (1879):  The two powers promised each other support in case of attack by Russia.
i don't know