Why might the formation of military Alliances make it more likely to go to war w?

The formation of military alliances can create a sense of obligation among member states to support one another in conflicts, increasing the likelihood of war. When an ally is threatened, member countries may feel compelled to intervene, escalating localized disputes into broader conflicts. Additionally, the existence of alliances can embolden nations to adopt aggressive policies, believing they have the backing of their partners. This dynamic can lead to a chain reaction of military escalation and miscalculation.