In World War II, Germany destroyed Poland in World War I, which took only 35 days, which made the world marvel at the powerful offensive power of the German army, but also made people mistakenly think that Poland was just a small and weak country. In fact, before World War II, Poland was not only not a small and poor country, but also an industrial power, with a million well-equipped troops. There were three reasons for Germany's lack of confidence in blitzkrieg Poland: first, Poland was a powerful country with no weak overall strength; second, Poland had the support of Britain and France; and third, the Soviet Union might assist Poland.
Poland, which had been in power for 123 years at the Paris Peace Conference, gained independence with the support of Britain and France, and the nascent Polish territory included West Prussia, Posen Province, part East Prussia and part Upper Silesia, including a large part of Germany. Later, after the Soviet-Polish War of 1920, Poland quickly became an Eastern European power with a population of 27 million, a territory area of 380,000 square kilometers, and an army of nearly one million, and was also the most important ally of Britain and France on the Eastern Front. With the benefit of Britain and France, Poland naturally also pulled the hatred of Germany, between World War I and World War II.
In the eyes of many people, Polish soldiers and cavalry used sabers against German tanks, in fact, this is only a one-sided, the strength of the Polish army is very strong, first of all, Poland is a country, he can produce aircraft, tanks, warships, which was a very few countries at that time can do. Moreover, Poland and Britain and France were allies, so Germany felt that it was not confident in the early polish offensive. If Germany's blitzkrieg did not work, Britain and France would naturally declare war on Germany, and if Poland swore to die, Germany would be in a quagmire, so this is the reason why the German top brass is worried.
As the Polish government fled to Romania, the Soviet Union announced in the early morning of September 17 that, in view of the fact that the Polish government no longer existed, the Soviet-Polish non-aggression pact was no longer valid, and that the Red Army would march into eastern Poland "to protect the interests of the ukrainian and Belarusian minorities." The next day, the German and Soviet armies met on the Brest-Litovsk front. The cold humor is that less than two years later the Brest Fortress became the starting point for the German invasion of the Soviet Union, and the film was called "Decisive Fortress".