German Invasion of Poland
Description: invasion of Poland began on September 1, 1939, and marked the start of World War II in Europe. German forces launched a massive blitzkrieg ("lightning war"), combining fast-moving tanks, motorized infantry, and overwhelming air support from the Luftwaffe. Major Polish cities like Warsaw, Łódź, and Kraków were targeted. By the end of September, Warsaw had fallen, and by October 6, organized resistance was largely crushed.
