Why were borders important in 1914?

In 1914, borders were crucial due to the rise of nationalism and the competition among European powers, which heightened tensions leading to World War I. Nations sought to assert their sovereignty and expand their territories, often resulting in conflicts over border disputes. The established borders were also significant as they defined alliances and rivalries among countries, contributing to the complex web of relationships that ultimately ignited the war. Additionally, borders played a role in the movement of troops and resources, impacting military strategies and outcomes.