After World War I, several new nations emerged in Europe as a result of the reconfiguration of political boundaries and the dissolution of empires. Here are five nations that were established during that period:
- Czechoslovakia - Formed in 1918 from territories that were part of the Austro-Hungarian Empire.
- Yugoslavia - Established in 1918, combining several South Slavic groups, previously under Austro-Hungarian and Ottoman rule.
- Poland - Regained independence in 1918 after more than a century of partitions, bringing together various Polish territories.
- Hungary - Became a separate nation in 1918 following the collapse of the Austro-Hungarian Empire, though it lost significant territory as a result of the Treaty of Trianon in 1920.
- Estonia - Declared independence in 1918 from Russia and was recognized in 1920.
These nations were shaped by the political dynamics of the post-war period and the treaties that followed the conflict.