World War I Begins

8/1/1914

Following the crisis touched off by the assassination of Archduke Ferdinand of Austria in Sarajevo, Germany declared war on Russia and additional countries joined the war within several days. The Central Powers (Germany and the Austro-Hungarian Empire) fought against the Allied powers (Great Britain, France, and Russia). In November 1914, Turkey sided with the Central Powers; in 1915, Italy joined the Allies.