After invading Poland, the Germans established ghettos in the incorporated territories and General Government to confine Jews. The ghettos were formed and closed off from the outside world at different times and for different reasons. For example, the Łódź ghetto was closed in April 1940, to force the Jews inside to give up money and valuables; the Warsaw ghetto was closed for health considerations (for the people outside, not inside, the ghetto), but this did not happen until November 1940; and the Kraków ghetto was not established until March 1941. The Warsaw Ghetto contained 380,000 people and was the largest ghetto in Poland; the Łódź Ghetto was the second largest, holding between 160,000 to 223,000. Because of the long drawn-out process of establishing ghettos, it is unlikely that they were originally considered part of a systematic attempt to eliminate Jews completely.
After World War II, Schindler and his wife Emilie settled in Regensburg, Germany, until 1949, when they immigrated to Argentina. In 1957, permanently separated but not divorced from Emilie, Schindler returned alone to Germany. Schindler died in Germany, penniless and almost unknown, in October 1974. Many of those whose survival he facilitated—and their descendants—lobbied for and financed the transfer of his body for burial in Israel.
Dynatron was Schindler's elevator drive system launched in 1965. It is based on Schlieren's Monotron drive which was developed in 1958. These drive systems are particularly distinguished by direct stopping, regulated electronically as a function of the distance to the floor level. Dynatron should not be confused with Schindler's Dynator (Ward Leonard) drive, which was introduced in 1945.
Guderian believed that developments in technology were required to support the theory; especially, equipping armoured divisions—tanks foremost–with wireless communications. Guderian insisted in 1933 to the high command that every tank in the German armoured force must be equipped with a radio. At the start of World War II, only the German army was thus prepared with all tanks "radio-equipped". This proved critical in early tank battles where German tank commanders exploited the organizational advantage over the Allies that radio communication gave them. Later all Allied armies would copy this innovation. During the Polish campaign, the performance of armoured troops, under the influence of Guderian's ideas, won over a number of skeptics who had initially expressed doubt about armoured warfare, such as von Rundstedt and Rommel.
Following the German invasion and occupation of Poland, Schindler moved to Krakow from Svitavy in October 1939. Taking advantage of the German occupation program to “Aryanize” and “Germanize” Jewish-owned and Polish-owned businesses in the so-called General Government (Generalgouvernement), he bought Rekord Ltd., a Jewish-owned enamelware manufacturer, in November 1939. He converted its plant to establish the Deutsche Emalwarenfabrik Oskar Schindler (German Enamelware Factory Oskar Schindler), also known as Emalia.
Historians differ on the date of the decision to murder Jews systematically, the so-called “final solution to the Jewish question.” There is debate about whether there was one central decision or a series of regional decisions in response to local conditions. In either case, when Germany attacked the Soviet Union, its former ally, in June of 1941, the Nazis began the systematic killing of Jews.