Aronson worked at the clothing depot, Ausekla, for much of the period between the German invasion and 1943. In 1943, the Riga-Kaiserwald concentration camp system was formally established.Joseph Robert White (2012), "Riga-Kaiserwald Main Camp (aka Mežaparks)," in The United States Holocaust Museum Encyclopedia of Camps and Ghettos, 1933-1945: Volume 1: Early Camps, Youth Camps, and Concentration Camps and Subcamps Under the SS-Business Administration Main Office (WVHA), Geoffrey P. Megargee, ed. (Bloomington: Indiana University Press), 1230. Many Jews already lived and worked at satellite work camps in the region, which were now considered to be part of the Kaiserwald system. The Riga Ghetto was liquidated, moving the Jews from one horrible situation to another. Most Jews from the ghetto or satellite camps passed through Kaiserwald briefly on their way to work assignments within the system. Aronson worked at the Lenta subcamp, and outgrowth of Ausekla.
