Aftermath of the Assassination

Assassination of the archduke in Serbia

Jun 28, 1914

The Archduke and his wife are killed by Gavrilo Princip.

Austria-Hungary's ultimatum to Serbia

Jul 23, 1914

Austria-Hungary sends an ultimatum to Serbia, giving them only forty-eight hours to comply.

Germany allies with Austria

Jul 24, 1914

Serbia responds to Austria's demands

Jul 25, 1914

The Serbian government agrees to most of the demands in the ultimatum, but not all.

Serbia violates Austro-Hungarian border

Jul 25, 1914

Austria breaks off diplomatic relations with Serbia

Austria-Hungary declares war on Serbia

Jul 28, 1914

Russia mobilizes troops

Jul 29, 1914

Austria-Hungary mobilizes troops

Jul 31, 1914

Germany sends an ultimatum to Russia

Jul 31, 1914

Germany demands for Russia to stop military preparations.

France mobilizes troops

Aug 1, 1914

Germany declares war on Russia

Aug 1, 1914

Germany also begins mobilizing troops.

Germany and the Ottoman Empire sign a secret treaty

Aug 2, 1914

Germany declares war on France

Aug 3, 1914

Britain declares war on Germany

Aug 4, 1914

Austria-Hungary declares war on Russia

Aug 6, 1914

Japan declares war on Germany

Aug 23, 1914

Japan declares war on Austria-Hungary

Aug 25, 1914