World War I

Assassination of Archduke Franz Ferdinand aong with his wife in Sarajevo

Jun 28, 1914

Germany and the Ottoman Empire sign a secret alliance treaty

Jul 1, 1914

Austria-Hungary seeks German support for a war against Serbia in case of Russian mobilization. Germany gives assurances of support

Jul 5, 1914

Austria-Hungary sends an ultimatum to Serbia, and their respnse is seen as unsatisfactory

Jul 23, 1914

Austria-Hungary declared war on Serbia

Jul 28, 1914

Germany warns Russia to stop mobilizing

Jul 31, 1914

Germany declared war on Russia

Aug 1, 1914

Italy declares its neutrality

Aug 1, 1914

Germany declared war on France and Belgium

Aug 3, 1914

Britain declared war against Germany

Aug 4, 1914

Germany's invasion of Belgium

Aug 4, 1914