Why did Switzerland not get involved in two world wars?

Hehe, let's talk about something else first. Switzerland's strength, like beating Spain in this year's World Cup, depends on defensive counterattack. This small European country, with a land area of less than 42,000 square kilometers and a population of less than 6.4 million, borders Germany, France and Italy, but this country has not experienced war for more than 600 years. There is a saying: "Swiss citizens step on civilians with their right foot and soldiers with their left foot." If we want to ask why we haven't fought for 600 years, the main reason is that we are always ready to fight. " Switzerland has been recognized as a permanent neutral country since the 18 15 Vienna Conference. Although Switzerland is a permanent neutral country, it is obvious that it did not rely on the guise of neutrality to avoid two world wars. In Switzerland, no matter how small the village is, there must be at least three things: a chapel, a coffee shop and a shooting range. Military knowledge is very popular. Before World War I, Emperor William II wanted to invade Switzerland. When the Swiss knew about it, they invited him to visit the scene where all the people in Switzerland were soldiers. Yu Di changed his mind and decided to take Belgium. During World War II, despite being in a peaceful environment, it not only did not stop preparing for war, but also attached great importance to national defense construction, and built the most perfect underground shelter system in the world, which can be used by all permanent residents. Some people compare Switzerland to cheese full of holes. The disguised residents' hut beside the road is actually the gate of a military base, from which tanks and military trucks equipped with missile launchers can be opened. There are all kinds of infrastructure necessary for life in the underground shelter project, and the necessary materials for life have been stored for more than 10 days. At the beginning of the new century, the Swiss Ministry of Defence cancelled the "Bicycle Force" that had been maintained for more than 100 years, making the Swiss army a more modern and regular force. After Hitler's army occupied France, 50 divisions were deployed on the eastern border of Switzerland, and "Operation Fir" was formulated to annex Switzerland. Although Switzerland pursues permanent neutrality abroad, it is "all-army and armed neutrality" at home. If the Germans went to war, within a few hours, Swiss men put on military uniforms and mobilized 500 thousand troops in a country with a population of only 4 million at that time. They are prepared to stick to the hidden position in the Alps for a long time, and at the critical moment, they will not hesitate to blow up the vital Kota Tunnel and Simpland Tunnel connecting Germany and Italy. There are not only many civil defense works underground in this country, but also many planes and tank caves disguised as hills on the ground. Coupled with the armed forces of the whole people, if the Germans invade, they will suffer heavy losses! However, in any case, in order to win this country with an area of only 42,000 square kilometers, the Germans have to pay at least 6,543,800 elite troops, which is really not worth the candle. So Germany did not seriously consider annexing Switzerland. Mussolini of Italy wanted to attract the attention of Switzerland, but he was beaten to death by the Greeks and even wagged his tail for help like Germany. Therefore, Italy does not have the military strength to win Switzerland, and Japan is beyond his reach.