On 17 September 1938, Adolf Hitler ordered the establishment of Sudetendeutsches Freikorps, a paramilitary organisation that took over the structure of Freiwillinger Schutzdienst/Ordnersgruppe, an organisation of ethnic Germans in Czechoslovakia that had been dissolved by the Czechoslovak authorities the previous day because of its implication in large number of terrorist activities. The organisation was sheltered, trained and equipped by German authorities and conducted cross-border terrorist operations into Czechoslovakian territory. Relying on the Convention for the Definition of Aggression, Czechoslovak President Edvard Beneš[2] and the Czechoslovak government-in-exile[3] later regarded 17 September 1938 to be the beginning of the undeclared German-Czechoslovak war.