In October 1939, German specialists took over control of the Southern Works and since June 1940 they operated under the name “Stahlwerke Braunschweig – Werk Stalowa Wola”. Potential of the plant during the II world was used for strategic aims of the III Reich, and when Germans left Stalowa Wola (1st August 1944), approx. 20% of the value of the Southern Works was irrecoverably lost.