Austria

The area of today's Austria was inhabited by the Celts.

The region was annexed by the Romans in the late 1st century BC.

Austria was developed into a Duchy.

Austria was elevated to an Archduchy.

Austria established its own empire before the dissolution of the Holy Roman Empire.

The establishment of Austria-Hungary followed the empire's defeat and territorial losses.

Austria declared war on Serbia after the assassination of Archduke Franz Ferdinand.

The Republic of German-Austria was proclaimed following the empire's collapse.

Austrofascist dictatorship was formed under Engelbert Dollfuss.

Austria was annexed into Nazi Germany by Adolf Hitler.

Austria was liberated from Nazi control post World War II.

Austria regained its sovereignty and declared its perpetual neutrality.

Austria became a member of the European Union.