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.