This had the effect of stirring genuine alarm in the British Ambassador, worried that he had been misled by Keitel, and that a German invasion of Czechoslovakia was imminent. On the afternoon of Saturday, 21 May, Henderson was instructed by the British Foreign Secretary Lord Halifax to inform Ribbentrop that the French were bound to intervene in the event of an attack on Czechoslovakia, and that the Germans should not depend upon the British standing by.228 Ribbentrop’s hysterical reply was scarcely reassuring: ‘If France were really so crazy as to attack us, it would lead to perhaps the greatest defeat in French history, and if Britain were to join her, then once again we should have to fight to the death.’229 By the Sunday, 22 May, however, British reconnaissance on the borders had revealed nothing untoward.230 It had been a false alarm.
The crisis blew over as quickly as it had started. But reactions abroad, not least in Britain, ran along the lines that German action
After days of brooding over the issue at the Berghof, pondering the advice of his military leaders that Germany was ill-equipped for an early strike against the Czechs, Hitler returned to Berlin and summoned a meeting of his top generals, together with leading figures from the Foreign Ministry, for 28 May.235 The day before the meeting, Hitler had told Raeder to speed up the construction programme for battleships and submarines.236 The target was plainly Britain. But Hitler did not expect war with the British over Czechoslovakia. The conflict with the west, he declared at the military conference the next day, would come after a further three or four years.237 Hitler told his generals bluntly: ‘I am utterly determined that Czechoslovakia should disappear from the map.’238 He claimed Germany was stronger than in 1914. He pointed to the train of successes since 1933. But there was no such thing as a lasting state of contentment. Life was a constant struggle. And Germany needed living-space in Europe, and in colonial possessions. The current generation had to solve the problem. France and Britain would remain hostile to an expansion of German power. Czechoslovakia was Germany’s most dangerous enemy in the event of conflict with the west. Therefore it was necessary to eliminate Czechoslovakia. He gave the incomplete state of Czech fortifications, the underdeveloped British and French armaments programmes, and the advantageous international situation as reasons for early action. The western fortifications were to be drastically speeded up. These would provide the framework for a ‘lightning march into Czechoslovakia’.239
Two days later, the revised ‘Case Green’ was ready. Its basic lines were unchanged from those drawn up earlier in the month by Keitel and Jodl. But the preamble now ran: ‘It is my unalterable decision to smash Czechoslovakia by military action in the foreseeable future.’ Keitel’s covering note laid down that preparations must be complete by 1 October at the latest.240 From that date on, Hitler was determined to ‘exploit every favourable political opportunity’ to accomplish his aim.241 It was a decision for war — if need be, even against the western powers.242