A popular subject of discussion for an alternate World War I is: a war against both Germany and Russia. So, in this timeline, Germany is able to patch up tensions between Austria-Hungary and Russia and keep the League of Three Emperors in tact. The opposing alliance would consist of: Great Britain, Portugal, France, Belgium (once Germany invades it), Italy, the Ottoman Empire, and Japan. Because of Austria-Hungary and Russia's patched tensions, the Balkan states: Romania, Bulgaria, Serbia, Montenegro, Albania, and Greece would probably fight Balkan wars separate from the Great War and be considered neutral.