What did the Balkans become after World War 1?

After World War I, the Balkans underwent significant political and territorial changes, leading to the dissolution of several empires, notably the Austro-Hungarian and Ottoman Empires. New nation-states emerged, including Yugoslavia, which united various South Slavic peoples, and Romania expanded its territory. The region was marked by ethnic tensions and nationalistic movements, setting the stage for future conflicts. Overall, the post-war period in the Balkans was characterized by instability and a struggle for national identity.