What country was most aggressive during world war 1?

Germany is often considered the most aggressive country during World War I, as it played a central role in initiating the conflict. The German Empire's strategic military planning, exemplified by the Schlieffen Plan, aimed to quickly defeat France and then turn east to confront Russia. Additionally, Germany's unrestricted submarine warfare and support for Austria-Hungary in its actions against Serbia contributed significantly to the escalation of tensions that led to the war. Overall, Germany's actions were pivotal in shaping the course of the conflict.