On this day in 1938, Hitler discussed with the other heads of the German Armed Forces High Command, of which Hitler was the leader, the political and military aspects of “Case Green”, the codename for the envisioned takeover of the Sudetenland, or German-occupied Czechoslovakia. At the time, about three million people in the Sudetenland were German.By May 1938, Hitler’s plans of occupying Czechoslovakia became known, causing the Czechs to rely on military assistance from France. The Soviet Union also had a treaty with Czechoslovakia that indicated its willingness to cooperate with France and Britain if they decided to come to Czechoslovakia’s defense.The French and British leadership believed that peace could be saved in the region only by giving the German areas of the Sudetenland to Germany. British Prime Minister Neville Chamberlain offered to go discuss the deal with Hitler; in their meeting, Hitler agreed to take no military action without further discussion but soon after broke that promise. Chamberlain also agreed to attempt to persuade his cabinet and the French to accept the results of a referendum in the Sudetenland. It was then agreed that all areas with a population of more than 50% Sudeten-Germans be turned over to Germany.Czechoslovakia was forced to accept the proposal on September 21, 1938. The next day, Hitler declared that he wanted Sudetenland occupied by the German army and as a result, the Czechoslovakians evacuated from the area by September 28. The French and the Czechoslovakians quickly mobilized their armies, however, the French and British were not prepared to fight just to protect Czechoslovakia. On September 29, Italian Prime Minister Benito Mussolini suggested that all parties meet to discuss a new agreement at the Munich Conference, in a last-minute effort to avoid war. The Munich Conference saw the leaders of France, Britain, Italy, and Germany come together, but the Czech representatives were not allowed to enter the conference because they were not invited.