The occurrence of World War I directly destroyed European people's imagination of contemporary civilization. The war ruthlessly destroyed the confidence of the past imperial era, and the era was filled with pessimism. However, the huge trauma did not bring corresponding reflections. Although the peace conference held by various countries in Paris after the war took "permanent peace" as the main goal, the different powers had different plans, which resulted in more many questions.
For example, the disputed border redrawing popular database and the issue of minority self-determination have left uncertainties for the future. The most critical of them is the cruel sanctions imposed on Germany in the Treaty of Versailles, which is almost a bloody retaliation by various countries against Germany, building peace in Europe by suppressing or even erasing Germany.
The force must lead to the reaction. Hitler and the Nazi Party led by him took advantage of the situation to rise in the barren Germany after the war. They gained power in the 1930s. They took advantage of the external environment of the Great Depression and gradually recovered in a dictatorial and centralized way. Germany's national strength began to expand outward, challenging the bottom line of the Treaty of Versailles step by step, tearing up the illusion of peace.