Final answer:
The Slavs of the Balkan league fought against the Ottoman Empire in 1912 and later formed Yugoslavia, which became a communist country under Josip Broz Tito after World War II.
Step-by-step explanation:
In 1912, the Slavs of the Balkan league fought against the Ottoman Empire, and later formed Yugoslavia, which emerged as a communist country under Josip Broz Tito after World War II.