Why were the balkans called the “powder keg” of europe?

Balkans were called the "powder keg" of Europe because of the tensions and conflicts in the political situation going on. The Balkans consisted of numerous ethnic people, different religious groups, several  cultural backgrounds.

Explanation:

The Balkans were preceded by World War 1 and in the early 20th century. Men from several countries joined the Balkan League because some were still under Ottoman rule even though independence had been achieved. It only took 4 states to defeat the Ottomans during the first war. However, Bulgaria was defeated in the 2nd war. When the "powder keg" finally exploded after fighting back and forth, this was when  the first World War was started.

It had endured more than 400 years of entail and political conflict.

Explanation:

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.

i believe the answer is d.