They were part of the alliance known as the Central Powers. When Archduke Franz Ferdinand was assassinated by the Black Hand Gang, who worked for Serbia, Ferdinand's uncle, Emperor of Austria, declared war on Serbia along with Germany and several other countries. This was what started the first World War.
Bulgaria
Quadraple Alliance
Bulgaria was part of the Central Powers, alongside with Germany, Austria-Hungary and the Ottoman Empire. It joined the alliance in October 1915.
At the beginning of the war, the Central Powers included Germany, Austria-Hungary, Bulgaria, and the Ottoman Empire. This was known as the Quadruple Alliance.
Germany, Austria-Hungary, and Italy
Germany. Austria-Hungary. Ottoman Turkey. Bulgaria
The Triple Alliance, aka The Central Powers. The main alliance included Germany, Italy, and Austria-Hungary. The Ottoman Empire also sided with Germany. Towards the end of the war, Italy joined the Entente and ceded from The Triple Alliance.
Germany, Austria-Hungary and Italy formed an alliance in 1888.
Germany was Austria-Hungary's Biggest allie
Germany, Austria-Hungary, and Italy
Answer this question… Russia had an alliance with Serbia, and Germany had an alliance with Austria-Hungary.
Germany, Italy, and Austria-Hungary