Who was the Aggressive German kaiser in World War 1?

The aggressive German kaiser during World War I was Kaiser Wilhelm II. He ruled from 1888 until his abdication in 1918 and was known for his militaristic and expansionist policies, which contributed to the tensions leading up to the war. Wilhelm II's leadership style and desire for a powerful German empire played a significant role in the conflict's escalation. Ultimately, his abdication marked the end of the German monarchy and the beginning of the Weimar Republic.