The Polish Campaign refers to the military operations conducted by Nazi Germany during the invasion of Poland in September 1939. This campaign marked the beginning of World War II in Europe, as Germany sought to expand its territory. The invasion was characterized by the use of blitzkrieg tactics, which combined fast-moving and coordinated attacks by air and ground forces. The campaign lasted from September 1 to October 6, 1939, resulting in a swift defeat for the Polish forces. The Polish military was outmatched by the superior technology and tactics of the German army, leading to the occupation of Poland. This invasion also prompted the United Kingdom and France to declare war on Germany, further escalating the conflict.