Under the oppression of Britain and France and the threat of Hitler, the Sudetenland of Czechoslovakia was divided into Germany on September 29th, 1938, which was the Munich Agreement, but Germany did not stop annexing the whole of Czechoslovakia on March 29th, 1939. Then Hitler pointed his finger at Poland. 1939 In April, Hitler issued the battle plan of "destroying Poland forever". On September 1 day, Germany dispatched more than 50 divisions, more than 2,000 tanks and more than 2,000 planes to launch a surprise attack on Poland. Poland's hasty response, coupled with backward weapons and poor equipment, blindly relied on Britain and France. Britain and France expect Germany to attack the Soviet Union after defeating Poland. Since Poland is an ally of Britain and France, declaring war on Germany is actually a declaration of surrender without fighting. At that time, the Germans had only 23 divisions on the western front, while Britain and France had a huge force of 1 10 divisions, but they did not attack, resulting in the so-called "strange war." The state of "sit-in war" and "funny war" In fact, Germany and the Soviet Union have signed the Soviet-German Non-aggression Treaty. While the Germans attacked Poland, according to internal sources, the Soviet Union also officially attacked Poland from the eastern front. The Soviet Union hoped that Germany could fight bourgeois Britain and France. Britain and France also hope to "bring disaster to the East". It was under such circumstances that Hitler grasped the psychology of Britain, France and the Soviet Union well, and took advantage of it to expand and gain benefits. Of course, I think this is the main reason for the prosperity of the Third Reich. But we also saw in the war against Poland that apart from this reason, there is another important reason, which is the German army's own combat effectiveness. There is no denying that Hitler's slogan of "replacing butter with artillery" is effective. German equipment, combat effectiveness, soldiers' quality, strategy and tactics, and German ace armored forces are all at the most advanced level in the world. This is obvious from the war against France.