AP US History
The German invasion of Poland began on September 1, 1939, marking the start of World War II in Europe. This military campaign was characterized by the use of Blitzkrieg tactics, which combined rapid, coordinated assaults by air and ground forces. The invasion not only led to the swift defeat of Polish defenses but also triggered Britain and France to declare war on Germany, solidifying the divide between Axis and Allied powers during the interwar period.