Chamberlain responded to Hitler's aggression by claiming the British were not bound to protect Czechoslovakia since the country in effect no longer existed after Slovakia had voted for independence on March 14th. And Hitler's actions had occurred the next day, March 15th.
The Prime Minister's willy-nilly statement caused an uproar in the British press and in the House of Commons. Chamberlain was lambasted over his lack of moral outrage concerning Hitler's gangster diplomacy. Angry members of the House of Commons vowed that Britain would never again appease Hitler.
Interestingly, while traveling on a train from London to Birmingham on Friday, March 17, Chamberlain underwent a complete change of heart. He had in his hand a prepared speech discussing routine domestic matters that he was supposed to give in Birmingham. But upon deep reflection, he decided to junk the speech and outlined a brand new one concerning Hitler.
In the new speech, which was broadcast throughout England on radio, Chamberlain first apologized for his lukewarm reaction to Hitler's recent actions in Czechoslovakia. Then he recited a list of broken promises made by Hitler dating back to the Munich Agreement.
"The Führer," Chamberlain asserted, "has taken the law into his own hands."
"Now we are told that this seizure of territory has been necessitated by disturbances in Czechoslovakia...If there were disorders, were they not fomented from without?"
"Is this the last attack upon a small state or is it to be followed by others? Is this, in effect, a step in the direction of an attempt to dominate the world by force?"
If so, Chamberlain declared: "No greater mistake could be made than to suppose that because it believes war to be a senseless and cruel thing, this nation has so lost its fiber that it will not take part to the utmost of its power in resisting such a challenge if it ever were made."
Now, for the first time in the history of the Third Reich, Great Britain had finally declared it would stand up to the German dictator and was willing to fight.
The next day, March 18, British diplomats informed the Nazis that Hitler's occupation of Czechoslovakia was "a complete repudiation of the Munich Agreement...devoid of any basis of legality." The French also lodged a strong protest saying they "would not recognize the legality of the German occupation."
However, Hitler and the Nazis could care less what they thought. Hitler had seen his "enemies" at Munich and considered them to be little worms.
But now, in an ominous development for Hitler, Britain and France went beyond mere diplomatic protests. On March 31st, Prime Minister Chamberlain issued a solid declaration, with the backing of France, guaranteeing Hitler's next likely victim, Poland, from Nazi aggression.
The era of Hitler's bloodless conquests had ended. The next time German troops rolled into foreign territory there would be an actual shooting war.
It had been just six months since the Munich Agreement and there were only about six months left until the outbreak of World War II. During these months, the various countries of Europe formed military alliances, choosing up sides like schoolboys preparing for a game of football – France with Britain and Poland, Italy with Germany and so forth. No one, however, could figure out what Soviet Russia under Josef Stalin would do.