Which of the following events led to the ethnic conflict in the balkans in 1989

The impact of the ethnic conflict in the Balkans especially of race beliefs and some other things resulted in 100,000 people killed and 1 million people relocated from their homes during this conflict. Refugees fled to neighboring European countries and the European Union, and NATO sent peacekeeping troops to the region to prevent the conflict from starting again.

Explanation:

austria

hugary

yugoslavia

czechoslovakia

the main reason that the constitution did not proclaim all men to be free and equal is because of the issue of slavery.