Some ghettos were initially open, which meant that Jews could leave the area during the daytime but had to be back by a curfew. Later, all ghettos became closed, meaning that Jews were not allowed to leave under any circumstances. Major ghettos were located in the cities of Polish cities of Bialystok, Lodz, and Warsaw. Other ghettos were found in present-day Minsk, Belarus; Riga, Latvia; and Vilna, Lithuania. The largest ghetto was in Warsaw. At its peak in March 1941, some 445,000 were crammed into an area just 1.3 square miles in size.
In 1944, Plaszow transitioned from a labor camp to a concentration camp and all Jews were to be sent to the death camp at Auschwitz. Schindler requested Göth allow him to relocate his factory to Brnĕnec, in the Sudetenland, and produce war goods. He was told to draw up a list of workers he wanted to take with him. With Stern’s help, Schindler created a list of 1,100 Jewish names he deemed “essential” for the new factory. Permission was granted and the factory was moved. Not wanting to contribute to the German war effort, Schindler ordered his workers to purposefully make defective products that would fail inspection. The employees spent the remaining months of the war in the factory.
In 1935 the Wehrmacht began to build a large military complex close to the village of Belsen, a part of the town of Bergen, in what was then the Province of Hanover. This became the largest military training area in Germany of the time and was used for armoured vehicle training. The barracks were finished in 1937. The camp has been in continuous operation since then and is today known as Bergen-Hohne Training Area. It is used by the NATO armed forces.