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.
Operation Poro Operation Poro (the Finnish for Reindeer), was a planned invasion of the north Scandinavian peninsula by the Soviets. The plan originated in 1932 and was rehashed during the period 1935 to 1936. The plan was for a Soviet offensive through northern Finland and Sweden with the aim of occupying northern Norway. The Norwegian Labour Party was involved in similar efforts already from the early 1920s to the early 1930s, as exposed in a parliamentary report in 1932.