Expulsion of Ethnic Germans

Ethnic Cleansing: A policy designed by one ethnicity or religious group to remove by violent and terror-inspiring means the civilian population of another ethnic or religious group from certain geographic areas.

Potsdam Agreement: An agreement reached at the Potsdam Conference in 1945 by three WWII allies, the United Kingdom, United States, and Soviet Union. It included details about how to handle post-war Germany, including expelling German populations from Czechoslovakia, Hungary, and Poland back to Germany.

World War II: The global conflict that took place between 1939-1945 involving many world's nations divided into two opposing military alliances - Allies and Axis powers.