In addition to the Lwów ghetto, in September 1941 the occupation authorities set up a German Armament Works D.A.W. factory (
Deutsche Ausrüstungswerke) in prewar Steinhaus Milling Machines Merchants (
Maszyny młyńskie - Sprzedaż) on 134 Janowska Street (Grodecka 10a address), in northwestern suburbs of Lwów. This factory became a part of a network of factories owned and operated by the SS. The commandant of the camp was '''' Fritz Gebauer. The Germans used Jews who worked at this factory as forced laborers, mainly working in
carpentry and
metalwork. In October 1941, the Germans established a concentration camp next to the factory, which housed the forced laborers along with other prisoners. Thousands of Jews from the Lwów ghetto were forced to work as
slave laborers in this complex. When the Germans liquidated the Lwów ghetto, the ghetto's inhabitants who were fit for work were sent to the Janowska camp; the rest were deported to the German Nazi death camp
Belzec for extermination. The concentration camp was guarded by a
Sonderdienst battalion of the
Hiwi guards known as "
Trawniki men", drawn from Soviet POWs. In addition to being a forced-labor camp for Jews, Janowska was a transit camp during the
mass deportations of Polish Jews to the killing centers in 1942 from across German-occupied southeastern Poland (now western Ukraine). Jews underwent a selection process in Janowska camp similar to that used at
Auschwitz–Birkenau and
Majdanek German
extermination camps. Those classified as fit to work remained at Janowska for forced labor. The majority, rejected as unfit for work, were deported to Belzec and murdered, or else were shot at the Piaski ravine, located just north of the camp. In the summer and fall of 1942, thousands of Jews (mainly from the Lwów ghetto) were deported to Janowska and murdered in the Piaski ravine. ==Liquidation==