To prevent further resistance, the SS decided to kill most of the remaining Jews who were employed in forced-labor projects of the Ostindustrie (Osti) enterprise owned by the SS, while imprisoned at the Trawniki, Poniatowa, and Majdanek concentration camps, with subcamps in Budzyn, Kraśnik, Puławy, Lipowa and others.[6] The inmates were ordered to dig "anti-tank trenches", and were therefore unaware of their true purpose as mass graves.[2]