Austria-Hungary declares war on Russia
Montenegro declares war on Austria-Hungary
World War I Begins
Germany invades Belgium, beginning World War I.
Germany declares war on Russia, Germany and the Ottoman Empire sign a secret alliance treaty
Archduke Assassination
Archduke Franz Ferdinand is assassinated in Sarajevo. His death is the event that sparks World War I.
Russia Mobilizes
Russia mobilizes its vast army to intervene against Austria-Hungary in favor of its ally, Serbia. This move starts a chain reaction that leads to the mobilization of the rest of the European Great Powers, and inevitably to the outbreak of hostilities.
Lusitania Sinks
A German submarine sinks the passenger liner Lusitania. The ship carries 1,198 people, 128 of them were Americans.
Group of German prisoners bringing in a wounded man
Somme - Ancre Area, France.
Removing wine from cellars
Original Caption: British and French soldiers removing the wines from the cellars in Amiens into lorries.