Łapanka ( ) was the Polish name for a World War II practice in German-occupied Poland, whereby the German SS, Wehrmacht and Gestapo rounded up civilians on the streets of Polish cities. The civilians arrested were in most cases chosen at random from among passers-by or inhabitants of city quarters surrounded by German forces prior to the action.

The use of slave and forced labour in Nazi Germany and throughout German-occupied Europe during World War II took place on an unprecedented scale. It was a vital part of the German economic exploitation of conquered territories. It also contributed to the mass extermination of populations in occupied Europe. The Germans abducted approximately 12 million people from almost twenty European countries; about two thirds came from Central Europe and Eastern Europe. Many workers died as a result of their living conditions – extreme mistreatment, severe malnutrition and abuse were the main causes of death. Many more became civilian casualties from enemy (Allied) bombing and shelling of their workplaces throughout the war. At the peak of the program the forced labourers constituted 20% of the German work force. Counting deaths and turnover, about 15 million men and women were forced labourers at one point during the war.