In 1-2 sentences, analyze why an alliance system emerged in Europe in the early twentieth century. (2 points)

An alliance system emerged in Europe in the early twentieth century as nations sought to protect their national interests, maintain a balance of power, and deter potential aggressors in the increasingly tense geopolitical climate.

The alliance system emerged in Europe in the early twentieth century as a response to the growing tensions and rivalries between countries, as nations sought security and protection through forming alliances with other nations.

One reason for the emergence of alliance systems in Europe in the early twentieth century was the complex web of competing national interests, imperial ambitions, and rivalries among major powers, which led countries to seek alliances as a means of protecting their own interests and deterring potential adversaries. Additionally, the growing arms race and the fear of being left isolated in the event of a conflict also motivated countries to form alliances for mutual defense and security.