World War One  in 1914

June 28,1914 
Archduke Franz Ferdinand and his wife heir to the throne of the Austro- Hungarian Empire and his wife are assassinated in Sarajevo.

June 28,1914
Emperor Franz Joseph of Austria-Hungary declares war on Serbia.

July 31,1914
As an ally of Serbia, Russia announces full mobilization of her armed forces.

August 1,1914
Germany mobilizes her armed forces and declares war on Russia.

August 3,1914
Germany declares war on France.

August 4,1914
Germany declares war on neutral Belgium  and invades in a right flanking move to designed to defeat France quickly, as a result of this invasion Britain declares war on Germany.

August 6,1914
Austria-Hungary declares war on Russia.

August 22,1914iin
"The Battle of the Frontiers" - 27,000 French soldiers die on this single day in an offensive in an offensive thrust to the East of Paris, toward the German  borders.

August 26-30,1914
German army led by Erich Ludendorff and Paul von Hindenburg achieves its greatest victory of the war on  the Eastern front against Russia at The Battle of Tennenburg.

September 5-10 1914
First Battle of the Marne halts German invasion in France.

September 15,1914
First trenches of the Western front are dug.

December 25,1914
Unofficial Christmas truce declared by soldiers on the Western front.