What does the expression power keg of Europe mean?

Answer 1

the Balklands, an area in the south east part of Europe. Often referred to as the "powder keg" of Europe because of its long standing history of Nationalist uprisings and ethnic clashes. in the early 1900s the ottoman empire was failing and many groups were able to separate themselves from their ottoman rulers. countries such as Greece, Bulgaria, Montenegro, Romania, and Serbia were able to become stable standing countries after there separation from the Ottomans.