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). It faced and was defeated by the Allied Powers that had formed around the Triple Entente. The Powers' origin was the alliance of Germany and Austria-Hungary in 1879. The Ottoman Empire and Bulgaria did not join until after World War I had begun, although the Ottoman Empire retained close relations with both Germany and Austria-Hungary since the beginning of the 20th century.
Dual power (Russian Revolution) "Dual Power" (Russian: Двоевластие , "Dvoyevlastiye" ) was a term first used by Vladimir Lenin, although conceptually first outlined by Pierre-Joseph Proudhon, which described a situation in the wake of the February Revolution in which two powers, the workers councils (or Soviets, particularly the Petrograd Soviet) and the official state apparatus of the Provisional Government coexisted with each other and competed for legitimacy. Lenin argued that this essentially unstable situation constituted a unique opportunity for the Soviets to seize power by smashing the Provisional Government and establishing themselves as the basis of a new form of state power. This notion has informed the strategies of subsequent communist-led revolutions, including the Chinese Revolution led by Mao.