Answer:
Countries began to engage in militarism.
Step-by-step explanation:
The Europe nations formed the alliances; the agreements aimed to promote peace through the formation of powerful combinations that were irresistible. The people were, however, referred to as powered keg because the Balkans were intense in overlapping the claim of the territories and other ethnic groups that had national revolts.
It was so tricky that they took a single park that later resulted in a big war and other conflicts that then spread faster to other parts within the continent.