Poland is a populous country in Europe and a country with a large territory in Europe, but in history, Poland has been destroyed three times. After the end of World War I, Poland was restored. After the restoration of Poland, it was very arrogant, the situation in Europe at that time was also conducive to the development of Poland, Germany had just been defeated, Poland immediately invaded and occupied Germany's Danzig, making East Prussia an enclave of Germany, and also clamoring to eliminate Germany in a month, Germany had just been defeated, although did not dare to say anything, but hated Poland to the bone.
Poland also offended Soviet Russia at that time, when The Soviet Union had just been established, the domestic situation was turbulent, and foreign forces were constantly invading Soviet Russia, and among the foreign forces, the leader was Poland, and Soviet Russia was forced to cede part of its territory to Poland. During the Paris Peace Conference, Poland again openly supported Japan in occupying China's Shandong region, which not only offended China, but also offended the interests of Britain and France in China, and also offended them.
After Hitler came to power, he was always obsessed with the practices of Poland, and he reorganized his armaments at a very fast speed, so that Germany's military strength developed rapidly. On 21 March 1939, Germany demanded that Poland cede the Danzig region, but this was refused. On 31 March, Britain and France formed an alliance and offered military protection to Poland, which strengthened Poland's confidence in confronting Germany.
On September 1, 1939, the German army launched a blitzkrieg against Poland with 6 armored divisions, 4 light armored vehicles and 4 motorized divisions as the main assault force, and the defense line of 800,000 troops of the 6 German armies was immediately torn apart. German aircraft also flew overwhelmingly toward Poland, bombing important units in Poland. On 17 September, the Germans completed the siege of Warsaw, and although the Polish army put up fierce resistance, it had little effect due to the disparity in strength.
On September 17, as the Germans attacked Warsaw, the Soviet Union also began to send troops to invade Poland. On 5 October, the Polish Campaign ended with 690,000 German prisoners, 210,000 Soviet prisoners, and only 10,000 German casualties.