Final answer:
Yes, the name 'powder keg' was justifiable for the Balkan peninsula due to intense nationalistic tensions and conflicts that led to explosive and volatile situations in the region.
Step-by-step explanation:
Yes, the name 'powder keg' was justifiable for the Balkan peninsula. The Balkans was a region characterized by intense nationalistic tensions, conflicts, and rivalries. The diverse mix of nationalities, religions, and languages, combined with a history of invasions, conquests, and territorial fragmentation, created a volatile environment that posed a significant threat to peace and stability in Europe. The Balkan Wars in the early 20th century and the subsequent wars in Yugoslavia in the 1990s are examples of the explosive conflicts that occurred in the region, justifying the label 'powder keg'.