When Germany offered the surrender president Wilson would not agree to it unless something happened first. What was it?

President Wilson would only agree to Germany's surrender if the German Emperor, Kaiser Wilhelm II, abdicated. He believed that a fundamental change in Germany's leadership was necessary to ensure a genuine and lasting peace. This stance was part of Wilson's broader vision for a democratic post-war Europe. Ultimately, the abdication occurred, leading to the signing of the armistice on November 11, 1918.