1867 The Austro-Hungarian agreement known as Ausgleich ("the Compromise") is born through Act 12, which establishes the Austro-Hungarian Empire; on June 8 Emperor Franz Joseph is crowned King of Hungary.
1879 Germany and Austria-Hungary sign the "Twofold Covenant" and create the Dual Alliance.
1914 Austria-Hungary issues an ultimatum to Serbia demanding Serbia to allow the Austrians to determine who assassinated Archduke Franz Ferdinand. Serbia will reject those demands and Austria will declare war on July 28.
1917 Battle of Caporetto; Italy suffers a catastrophic defeat at the forces of Austria-Hungary and Germany on the Austro-Italian front of World War I (lasts until 19 November - also called Twelfth Battle of the Isonzo).
1917 World War I: Battle of Caporetto; Italy suffers a catastrophic defeat at the forces of Austria-Hungary and Germany. The young unknown Oberleutnant Erwin Rommel captures Mount Matajur with only 100 Germans against a force of over 7000 Italians.