What ensured that any conflict between 2 powers would quickly involve others?

The intricate system of alliances and treaties among various powers ensured that any conflict would quickly escalate. When one nation engaged in hostilities, its allies were often compelled to support it due to mutual defense agreements, while adversaries sought to counterbalance this support by rallying their own allies. This web of interconnections created a domino effect, where localized conflicts could rapidly escalate into larger, more widespread wars involving multiple nations. Additionally, nationalism and imperial ambitions further fueled these entanglements, making it difficult for powers to remain neutral.