Multiple choice Because Europe was divided into two major alliance systems, many countries stop building up their militaries. a small dispute between two countries could quickly involve many countries. wars would now be fought on a much smaller scale. the United States created its own alliance systems. Reveal answer Fill a bubble to check yourself B Correct answer Explanation The alliance system meant that a localized conflict between two nations would trigger a chain reaction, drawing in their respective allies and leading to a general European war.