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.
1913 in Italy The First Balkan War (October 1912 – May 1913) of the Balkan League (Bulgaria, Serbia, Greece and Montenegro) against the Ottoman Empire. As a result of the war, the allies captured and partitioned almost all remaining European territories of the Ottoman Empire. Ensuing events also led to the creation of an independent Albanian state. Despite its success, Bulgaria was dissatisfied over the division of the spoils in Macedonia, which provoked the start of the Second Balkan War (June–August 1913).  After the withdrawal of the Ottoman army from Libya after the Italo-Turkish War the Italians could easily extend their occupation of the country, seizing East Tripolitania, Ghadames, the Djebel and Fezzan with Murzuk during 1913.