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Adolf Hitler
Hitler is appointed Chancellor of Germany. http://www.historyplace.com/worldwar2/holocaust/h-chancl.htm -
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Invasion
Nazi troops enter Austria, which has a population of 200,000 Jews, mainly living in Vienna. Hitler announces Anschluss (union) with Austria. http://www.history.com/this-day-in-history/germany-annexes-austria -
Anti-Jew
The first anti-Jewish measures are taken in Vichy France. https://en.wikipedia.org/wiki/Vichy_anti-Jewish_legislation -
Auschwitz.
The start of deportation of Slovak Jews to Auschwitz. http://www.holocaustresearchproject.org/nazioccupation/slovakjews.html