Some historians believe that this was partly because Switzerland maintained a high degree of military vigilance, and partly because Switzerland had made huge compromises with Hitler at that time.

In 1815, the victorious countries in the Napoleonic Wars held a peace conference in Vienna. The Declaration of the Congress of Vienna finally declared Switzerland to be a permanent neutral country in Europe. After the defense of Gaeta in 1860, Swiss mercenaries completely bid farewell to the battlefield. This federal country that was founded by force began to advocate peace and neutrality.

After that, Belgium and Luxembourg also sought the status of "permanent neutral countries" and became permanent neutral countries according to the "London Treaty" of 1831 and the "London Treaty" of 1867 respectively. However, Belgium and Luxembourg were invaded by the German army in World War I. Their permanent neutral status was destroyed and was later abrogated by the 1919 Treaty of Versailles.

However, Switzerland retained its status as a "permanently neutral country" during World War I. The International Red Cross in Geneva played a very important role in humanitarian relief, which made various countries recognize Switzerland's influence. Therefore, after World War I, the Versailles-Washington System reaffirmed Switzerland's permanent neutral status and was the headquarters of the League of Nations. Also based in Switzerland.

Extended information: The Swiss Confederation covers an area of ??41,284 square kilometers and is a landlocked country located in central Europe. Switzerland has a population of approximately 7 million people. The official languages ??are German, French and Italian. The capital is Bern. Switzerland became independent in 1648 and pursued a policy of neutrality. In 1815, the Congress of Vienna confirmed Switzerland as a permanently neutral country. In 1848, Switzerland formulated a new constitution and established a Federal Council, becoming a unified federal country. Switzerland remained neutral in both world wars. The Swiss Constitution stipulates that Switzerland is a federal country, and each state is a sovereign state with its own constitution. The constitution stipulates that Switzerland implements direct democracy in the form of "referendums" and "citizens' initiatives". Any amendment to the provisions of the Constitution, the signing of an international treaty with a term of more than 15 years, or the joining of an important international organization must go through a referendum and be approved by each state before it can take effect.

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