In 1915, which Balkan nation joined W.W.I., on the side of the Central Powers (i.e. Germany), by declaring war on Serbia?
Central Powers with the Ottoman Empire on 19 August 1914. It was the last country to join the Central Powers, which Bulgaria did in October 1915 by declaring war on Serbia. It invaded Serbia in conjunction with German and Austro-Hungarian forces. Bulgaria held claims on the region of Vardar Macedonia then held by Serbia following the Balkan Wars of 1912–1913 and (from the Bulgarian point of view), the costly Treaty of Bucharest (1913). As a condition of entering WW1 on the side of the Central Powers, Bulgaria was granted the right to reclaim that territory. The Dervish movement was a rebel Somali
History of Germany during World War I History of Germany during World War I During World War I, 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. A tight blockade imposed by the Royal Navy caused severe food shortages in the cities, especially in the winter of