1914

June 28

Assassination of heir to the Austrian throne Franz Ferdinand and his wife in Sarajevo.

July 5

“Hoyos Mission”: Kaiser Wilhelm II assures Austria-Hungary of Germany’s support.

July 23

Austria-Hungary delivers Serbia an ultimatum.

July 25

Mobilization of the Serbian Army. The Russian Crown Council resolves to support Serbia.

July 28

Austria-Hungary declares war on Serbia.

July 30

General mobilization of the Russian Army.

July 31

General mobilization in Austria-Hungary and Belgium.

August 1

Germany declares war on Russia. General mobilization …