Final answer:
Increased likelihood of war.
Step-by-step explanation:
A potential consequence of militarism on diplomacy is increased likelihood of war. Militarism refers to a country's glorification of the military and readiness for war. When a nation builds up its military and prioritizes military solutions over diplomatic negotiations, it creates a climate of tension and aggression, making war more likely. This was evident in the arms race and rivalries between European powers before World War I, which eventually led to a devastating global conflict.