The Roma Genocide was a period in which Nazi Germany and its allies in World War II committed ethnic cleansing and eventual genocide against the Roma in Europe.
Under Adolf Hitler, on November 26, 1935, an additional decree was passed in the Nuremberg Laws that classified Roma as "enemies of the racial state", putting them in the same category as Jews and Poles. In a certain way, the fate of the Roma in Europe paralleled that of the Jews in the Holocaust.
Historians estimate that between 220,000 and 500,000 Roma were killed by the Nazis and their collaborators—in percentage terms, the numbers vary from 25% to more than 50% of the Roma in Europe at the time, which by some estimates was around 1 million. Later research, cited by Ian Hancock, estimated the number of victims at around 1.5 million out of an estimated 2 million Roma.
In 1982, West Germany officially admitted that Germany had committed genocide against the Roma. In 2011, Poland officially adopted August 2 as the Day of Remembrance of the Roma Genocide.
