What happened March 1938 AD in Germany

On 12 March 1938, Hitler announced the unification of Austria with Nazi Germany in the Anschluss.

On 28–29 March 1938, Hitler held a series of secret meetings in Berlin with Konrad Henlein of the Sudeten German Party, the largest of the ethnic German parties of the Sudetenland. The men agreed that Henlein would demand increased autonomy for Sudeten Germans from the Czechoslovakian government, thus providing a pretext for German military action against Czechoslovakia.