=1914=
June 28.--Assassination of Archduke Ferdinand and the Duchess of
Hohenberg at Sarajevo, Bosnia, by Servian student.
July 28.--Austria declares war on Servia, and hostilities commence,
after Germany and Austria refuse England’s invitation to a
conference.
August 1.--Germany formally declares war on Russia, and troops are
ordered mobilized.
France mobilizes.
August 3.--Germany declares war on France. German troops enter
Belgium.
August 4.--War declared by England on Germany.
August 6.--Austria declares war against Russia.
August 9.--Servia declares war on Germany.
August 11.--Montenegro declares war on Germany.
August 12.--France declares war on Austria-Hungary.
August 12.--England declares war on Austria.
August 23.--Japan in state of war with Germany.
August 25.--Austria declares war on Japan.
August 29.--Austria declares war on Belgium.
August 30.--Paris prepares for a siege.
September 5.--England, France and Russia agree not to treat for
peace separately.
October 30.--Russia declares state of war exists with Turkey.
November 5.--Great Britain officially announces state of war with
Turkey.
Servia severs diplomatic relations with Turkey.
=1915=
February 17.--Germans begin submarine campaign by sinking British
collier without warning.
February 24.--Britain closes Irish and North channels to all
navigation.
March 1.--Great Britain declares virtual blockade of German coast.
March 15.--British council order prohibits all traffic to and from
Germany.
May 23.--Italy declares war on Austria-Hungary.
October 14.--Bulgaria declares war on Servia.
=1916=
August 27.--Italy declares war on Germany.
Roumania entered the war on the side of the allies.
October 11.--Upon demand of Great Britain and France the entire
Greek fleet and sea-coast forts were turned over to the allies or
dismantled.
December 7.--David Lloyd George accepted British post of Prime
Minister and First Lord of the Treasury.
December 8.--Roumanian army trapped in Prahova Valley, surrendered
to General von Mackensen’s forces.
December 12.--Chancellor von Bethmann-Hollweg announced to the
Reichstag that Germany and her allies proposed to enter forthwith
into peace negotiations.
=1917=
February.--The chief occurrences in the opening months of this year
were the blockade declared by Germany against the Entente Allies,
and the announcement of unrestricted submarine warfare upon neutral
shipping to the nations composing that alliance. This course was
justified by the German government as a retaliation against the
starvation blockade instituted by Great Britain and her allies.