Austria-Hungary

1914

 * – Councils regarding Serbia; also on.
 * – Ultimatum to Serbia.
 * – Minister leaves Belgrade.
 * – Partial mobilisation.
 * – Declaration of war on Serbia.
 * – General mobilisation.
 * – Declaration of war on Russia.
 * – Declaration of war on Japan.

1915

 * – Stephan Burián von Rajecz succeeds Leoplod Berchtold as Foreign Minister.
 * – Proposals to Italy regarding south Tyrol; Italy demurs.
 * – Italy denounces Triple Alliance.
 * – Presentation of Cessions proposed.
 * – Note to Italy regarding Triple Alliance.
 * – Italy declares war on Austria-Hungary.