What new countries were created by world war 1?

World War I led to the dissolution of empires and the creation of several new countries. Key nations that emerged include Czechoslovakia, Yugoslavia, and Poland, which were formed from territories previously held by the Austro-Hungarian and Ottoman Empires. Additionally, Finland, Estonia, Latvia, and Lithuania gained independence from Russia during this period. These changes were largely formalized in the aftermath of the war through treaties such as the Treaty of Versailles.