Sudetendeutsches Freikorps (Sudeten German Free Corps, also known as the Freikorps Sudetenland, Freikorps Henlein and Sudetendeutsche Legion) was a paramilitary nationalist organization founded by Konrad Henlein composed of Czechoslovak ethnic Germans, with pro-Nazi sympathies who operated in Czechoslovakia from 1938 to 1939. They played a part in Hitler's successful effort to occupy Czechoslovakia and annex the region known as Sudetenland into the Third Reich and were engaged in terrorist acts against Czechoslovakia