By 27 March, meanwhile, Chamberlain, warned that a German strike against Poland might be imminent, was telling the British cabinet he was prepared to offer a unilateral commitment to Poland, aimed at stiffening Polish resolve and deterring Hitler.135 The policy that had been developing since the invasion of Czecho-Slovakia found its expression in Chamberlain’s statement to the House of Commons on 31 March 1939: ‘In the event of any action which clearly threatened Polish independence, and which the Polish Government accordingly considered it vital to resist with their national forces, His Majesty’s Government would feel themselves bound at once to lend the Polish Government all support in their power.’136
This was followed, at the end of Beck’s visit to London on
On hearing the British Guarantee of 31 March, Hitler fell into a rage. He thumped his fist on the marble-topped table of his study in the Reich Chancellery. ‘I’ll brew them a devil’s potion,’ he fumed.138
Exactly what he had wanted to avoid had happened. He had expected the pressure on the Poles to work as easily as it had done in the case of the Czechs and the Slovaks. He had presumed the Poles would in due course see sense and yield Danzig and concede the extra-territorial routes through the Corridor. He had taken it for granted that Poland would then become a German satellite — an ally in any later attack on the Soviet Union. He had been determined to keep Poland out of Britain’s clutches. All of this was now upturned. Danzig would have to be taken by force. He had been thwarted by the British and spurned by the Poles. He would teach them a lesson.139
Or so he thought. In reality, Hitler’s over-confidence, impatience, and misreading of the impact of German aggression against Czecho-Slovakia had produced a fateful miscalculation.
The next day, 1 April, speaking in Wilhelmshaven after attending the launch of the
At the end of March Hitler had indicated to Brauchitsch, head of the army, that he would use force against Poland if diplomacy failed. Immediately, the branches of the armed forces began preparing drafts of their own operational plans. These were presented to Hitler in the huge ‘Führer type’ that he could read without glasses. He added a preamble on political aims. By 3 April the directive for ‘Case White’