Between July and September of 1942, 254,000 to 300,000 Jews were deported from the Warsaw Ghetto to the Treblinka extermination camp. Due to the large numbers all being deported at the same time, and the rumors that started to surface following these deportations, it became apparent that deportation meant a death sentence.
These rumors convinced the residents of the Warsaw Ghetto that they had nothing to lose; their only alternative was to fight. In early 1943, an uprising occurred in the Warsaw Ghetto. It led to massive casualties on both sides and disquieted the Nazi party sufficiently that the order was given to wipe out the Warsaw Ghetto completely. Not only were all remaining residents of the Ghetto to be liquidated, but the Ghetto itself was razed.
Businesses that provided war materials for the Nazi war effort profited from the use of slave labor. The purpose of the selections at Auschwitz was to provide strong, unpaid laborers to companies such as IG Farben.
Originally formed in 1925, the company was a German-owned conglomerate and the fourth largest corporation in the world. During the war years, through its agreements with the Nazi party, the major part of its work force was made up of Auschwitz inmates. It wasn't until much later, following intense investigation, that it was discovered IG Farben had connections with many international companies that also benefited from the slave laborers provided through Auschwitz. IG Farben actually located a plant in the grounds of the Auschwitz camp, in order to increase production efficiency. One of the Auschwitz prisoners who worked there was Primo Levi, now famous for his moving Holocaust memoirs.