Ethnic Cleansing is the removal of people of particular races and or religions from particular geographic areas. It can also be a Euphemism for Genocide. Notable ethnic cleansings of the last 100 years include the millions of people who moved between Greece and Turkey in the 1920s. Such forcible removals often involve the use or threat of violence to intimidate people into leaving their homes, and in some cases there are no records of exactly how many died or disappeared in the process. Therefore ethnic cleansing can border on or even be a precursor of Genocide.