From Wikipedia, the free encyclopedia

Arbeitseinsatz (German: for ‘labour deployment’) was a forced labour category of internment within Nazi Germany (German: Zwangsarbeit) during World War II. When German men were called up for military service, Nazi German authorities rounded up civilians to fill in the vacancies and to expand manufacturing operations. Some labourers came from Germany but exponentially more from roundups (łapanka) in the German-occupied territories. Arbeitseinsatz was not restricted to the industry sector and to arms producing factories; it also took place, for example, in the farming sector, community services, and even in the churches.

https://en.wikipedia.org/wiki/Arbeitseinsatz