The Central Powers was a group of nations fighting against the Allied Powers during World War I; the members included Germany, Austria-Hungary, Bulgaria, the Ottoman Empire, and their territories. They were also supported by Azerbaijan and Finland, as well as Lithuania in 1918 and co-belligerent Jabal Shammar. They lost the war. The Allied Forces include Great Britain, Canada, Newfoundland, Russia, France, later the United States, Greece, Portugal, Brazil, Georgia, Armenia, and many other countries.
Italy joined the allies in the midst of World War I. All they wanted was to get some colonies. This greed lasted till World War II, but Italy did not gain anything they wanted to. They also wanted to destroy the Allies with tanks which were left on the beaches of Normandy on D-Day.