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Assassination
Archduke Ferdinand is assassinated by a Serbian national -
Declaring War
Austria-Hungary declares war on Serbia, effectively beginning the First World War -
Declaring War
Germany declares war on Russia. France and Belgium begin full mobilization -
Declaring War
Germany declares war on France, and invades neutral Belgium. Britain then sends an ultimatum, rejected by the Germans, to withdraw from Belgium. -
British Troops
The first British troops land in France -
Declaring War
Great Britain and France declare war on Austria-Hungary. Serbia is invaded by Austria-Hungary. -
Declaring War
Japan declares war on Germany -
Invasion
Austria invades Serbia -
Declaring Waters
Germany declares the waters surrounding British Isles to be a war zone in which ships can be sunk without warning -
Battle of St. Julien
Battle of St. Julien begins -
Agreement
Secret agreement signed in London between Italian Government and the Entente for Italian co-operation in the war and declarations by which Italy adheres to the Pact of London -
Lusitania Sunk
Lusitania Sunk -
Death Toll
The British Army suffers the worst single-day death toll in its history as 18,800 soldiers are killed on the first day of the Battle of the Somme -
Britannic Sunk
British hospital ship "Britannic" sunk by mine in Ægean Sea. -
Battle of Kut
Battle of Kut begins -
Protest
A mass protest by Russian civilians in Petrograd -
Declaring War
The United States of America declares war on Germany -
Troops
The first American troops land in France -
Declaring War
China declares war on Germany and Austria-Hungary -
Captured
The village of Passchendaele is captured by Canadian troops -
Peace Plan
President Woodrow Wilson outlines an elaborate peace plan to the U.S. Congress containing Fourteen Points as the basis of its establishment. -
Narva
Narva (Estonia) occupied by German forces -
Armistice
Armistice concluded between the Allied and Associated Powers and Germany -
Ending War
German delegation signs the Treaty formally ending the war
