Sudetendeutsches Freikorps

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

Terrorism
Members of Freikorps were trained and hosted in Nazi Germany but operated across the border in Czechoslovakia attacking the infrastructure, administrative, police and military buildings and personnel, as well as the pro-government and antifascist civilians. They committed assassinations, robberies and bombing attacks.They murdered more than 100 and kidnapped for delivery to Germany more than 2000 Czechoslovak personnel, political opponents or their family members. During September 1938 the Free Corps would fight a low level conflict on Czechoslovakia's border with the Czechoslovak State Defense Guard.

They halted their operations after the Nazis took control of the rump of Czechoslovakia in March 1939.