1. The dramatic change in the situation led to the collapse of many countries

1. The dramatic change in the situation led to the collapse of many countries.，Like the Ottoman Empire、Austria-Hungary、The German Empire collapsed，Instead, a new system or regime emerged。This war not only redrawn the borders of Europe，It also laid the groundwork for the outbreak of World War II，In particular, the sexual terms and war reparations against Germany caused unrest in German society.，Created conditions for the rise of the Nazi regime。