Final answer:
In Elie Wiesel's 'Night', the prisoners arrive at Buna after being transferred from Auschwitz. Buna, also known as Auschwitz III, was part of the complex of camps within Auschwitz mainly designed for slave labor.
Step-by-step explanation:
In the book Night by Elie Wiesel, the name of the new camp that the prisoners arrive at is Buna, which is also known as Auschwitz III. Despite Auschwitz being more widely known as an extermination camp, it was indeed a complex of camps which included multiple subcamps like Auschwitz I (the main camp), Auschwitz II (Birkenau), and Auschwitz III (Buna or Monowitz), the latter of which was associated with slave labor for the chemical company I.G. Farben. These camps were part of the systematic genocide orchestrated by the Nazi regime, aimed at exterminating the Jewish population and other groups deemed undesirable, with Auschwitz alone having 1.3 million people sent there and 1.1 million dying within its confines.