In 1935, they are able to pass the Nuremberg Laws which strips German Jews of their citizenship. It forbids intermarrying between non-Jewish Germans and Jews. This is only one of many steps that will continue to demean the rights of Jews inside of Germany. In 1938, you have what is known as Kristallnacht or the Night of Broken Glass. Hundreds of synagogues are burned, thousands of Jewish businesses are destroyed, and many Jews are killed in that night. Then as we get into 1939, Hitler's armies famously invade Poland, beginning what many historians consider to be the start of World War II. What would eventually be known as the Holocaust goes into full effect in 1941.