-
Archduke Franz Ferdinand
The assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, and his wife Sophie in Sarajevo (the capital of the Austro-Hungarian province of Bosnia-Herzegovina) on 28 June 1914 eventually led to the outbreak of the First World War. -
Austria-Hungary invades Russia.
The Austro-Hungarian Empire declares war on Russia. -
Germany Grants Austria Hungary
To blank check to punish serbia. -
Punitive Ultimatum To Serbia By Austria Hungary
The Austro-Hungarian ultimatum demanded that Serbia formally and publicly condemn the "dangerous propaganda" against Austria-Hungary, the ultimate aim of which, it claimed, is to "detach from the Monarchy territories belonging to it". -
Austria Hungary Declares WAr On Serbia
Austria-Hungary viewed the irredentist movements of South Slavs, as promoted by Serbia, as a threat to the unity of its multi-national empire. -
Allied forces land on the Gallipoli Peninsula of the Ottoman Empire.
Allied troops landed on the Gallipoli peninsula in Ottoman Turkey. -
German submarine sinks the passenger liner Lusitania during crossing from New York to Liverpool, England, killing 128 Americans.
the British ocean liner Lusitania is torpedoed without warning by a German submarine off the south coast of Ireland. -
Italy declares war on Austria-Hungary.
Italy resigned from the Triple Alliance and later declared war against Austria-Hungary at midnight on May 23. -
Germany begins the attack on Verdun.
when the German army began pounding the forts and trenches with artillery fire. 1,200 guns smashed the French positions. -
Naval Battle of Jutland takes place between British and German fleets.
was the largest sea battle of the First World War. It pitted 151 British warships against 99 German ships and was the first and only time the two battle fleets confronted each other. -
Allied offensive begins the Battle of the Somme.
after a week-long artillery bombardment of the German lines. Advancing British troops found that the German defences had not been destroyed as expected and many units suffered very high casualties with little progress. -
Battle of Verdun ends with 550,000 French and 450,000 German casualties.
would come to symbolize, more than that of any other battle, the bloody nature of trench warfare on the Western Front. -
Germany returns to unrestricted submarine warfare halted after the sinking of the Lusitania.
the lethal threat of the German U-boat submarine raises its head again, as Germany returns to the policy of unrestricted submarine warfare it had previously suspended in response to pressure from the United States and other neutral countries. -
United States severs diplomatic relations with Germany.
Relations were reestablished in 1921 but were severed again in 1941 during World War II when Nazi Germany declared war on the United States. -
the signing of The Treaty of Versaille.
The Treaty of Versailles was signed at the Palace of Versailles outside Paris, France.