Which mountainous country on the Balkan peninsula was historically divided into many city states and hundreds of islands?

The mountainous country on the Balkan peninsula that was historically divided into many city states and hundreds of islands is Greece. Greece is a country in southeastern Europe, located at the crossroads of Europe, Asia, and Africa. Greece has a long and rich history, and its ancient civilization is one of the most important in the world. Greece is home to many ancient city states, such as Athens, Sparta, and Thebes, as well as hundreds of islands, including Crete, Rhodes, and Lesbos.