Central Powers during WWI

Austria-Hungary

Jul 28, 1914

On July 28, 1914, one month to the day after Archduke Franz Ferdinand of Austria and his wife were killed by a Serbian nationalist in Sarajevo, Austria-Hungary declares war on Serbia, effectively beginning the First World War

German Empire

Aug 1, 1914

Germany entered into World War I on August 1, 1914, when it declared war on Russia. ... Italy, which was allied with Germany and Austria-Hungary before World War I, was neutral in 1914 before switching to the Allied side in May 1915. Historians have vigorously debated Germany's role.

Ottoman Empire

Oct 28, 1914

The Ottoman Empire joined the Central Powers to form the Triple Alliance with the signing of the August 1914 Turco-German Alliance. Turkey formally entered World War I on 28 October 1914 with the bombing of Russian Black Sea ports. The Triple Entente, or Allied Powers, declared war on the Ottoman Empire on November 4.

Bulgaria

Oct 14, 1915

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.