What was the German aggression in world war 1?

German aggression in World War I primarily manifested through its military strategies and the invasion of Belgium, which violated Belgian neutrality, prompting Britain to enter the war. Germany's aggressive foreign policy, exemplified by the Schlieffen Plan, aimed to quickly defeat France and then turn to fight Russia. Additionally, unrestricted submarine warfare and the use of chemical weapons contributed to its reputation for aggression during the conflict. This aggressive posture ultimately led to widespread destruction and significant loss of life, shaping the war's narrative and its aftermath.