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Gerrmany
the German Empire was one of the Central Powers that lost the war. It began participation in the conflict after the declaration of war against Serbia by its ally, Austria-Hungary. German forces fought the Allies on both the eastern and western fronts, although German territory itself remained relatively safe from widespread invasion for most of the war, except for a brief period in 1914 when East Prussia was invaded -
Ottoman Empire
The Ottoman Empire participated in World War I as one of the Central Powers. The Ottoman Empire entered the war by carrying out a surprise attack on Russia's Black Sea coast on 29 October 1914, with Russia responding by declaring war on 5 November 1914. -
Austria
was a constitutional monarchy in Central and Eastern Europe between 1867 and 1918. It was formed by giving a new constitution to the Austrian Empire, which devolved powers on Austria (Cisleithania) and Hungary (Transleithania) and placed them on an equal footing. It broke apart into several states at the end of World War I. -
Bulgary
The Kingdom of Bulgaria participated in World War I on the side of the Central Powers from 14 October 1915, when the country declared war on Serbia, until 30 September 1918, when the Armistice of Thessalonica came into effect.
