The level of secrecy maintained even in Hitler’s closest entourage in the days leading up to the offensive was profound. When his special armoured train, code-named
II
That offensive proceeded with a breathtaking pace that stunned the world. Even Hitler and his military leaders scarcely dared hope for such a scale of early successes.61 On the northern flank, the Dutch surrender followed within five days, the Queen and government fleeing to exile in England. Before that, the terror-bombing, Guernica-style, of Rotterdam’s old town had brought death and devastation from the skies. It was the trademark of the new type of warfare. Warsaw civilians had suffered it first; the people of British cities would soon come to dread it; and, later in the war, German citizens themselves would be exposed to its full horror. Belgian neutrality, for the second time in under thirty years, was breached along with that of the Dutch. On 28 May the Belgian army surrendered unconditionally, leaving King Leopold in effect a prisoner with the government in exile. Meanwhile, the ‘sickle cut plan’ was proving a brilliant and decisive success. Aided by the strategic and operational ineptitude of the French military command, German armoured units were able to sweep through the Ardennes, through Luxemburg and southern Belgium into northern France, breaking the thin line of French defence, and crossing the Meuse already on 13 May. Within ten days of the launching of the offensive, by the night of 20–21 May, the advance had covered 150 miles and reached the Channel coast. The ‘sickle cut’ had worked. The Allied forces had been cut in two; vast numbers were now squeezed between the coast and the oncoming German divisions. On 26 May the War Office in London bowed to what had become increasingly inevitable, and ordered the evacuation of the British Expeditionary Force, the bulk of it by then fighting a desperate rearguard action just east of Dunkirk, the last remaining Channel port in Allied hands. The next days would see almost 340,000 British and French soldiers — the vast proportion of the Allied troops still in combat in north-west France — carried to safety across the Channel in an improvised armada of small boats while the Luftwaffe pounded the harbour and beaches of the port.62
The evacuation had been greatly helped by Hitler’s decision, at 11.42a.m. on 24 May, to halt the German advance with the spearhead a mere fifteen miles or so from Dunkirk. Post-war suggestions that Hitler was deliberately allowing the British troops to get away as an act of generosity to encourage Britain to come to the peace table with its armies intact are far-fetched.63 Hitler himself was alleged to have told his entourage a fortnight or so later that ‘the army is the backbone of England and the Empire. If we smash the invasion corps, the Empire is doomed. Since we neither want to nor can inherit it, we must leave it the chance. My generals haven’t grasped that.’64 Such sentiments, if they were indeed expressed in those terms, were no more than a self-justification for a military mistake. For the decision not to move on Dunkirk was taken for military reasons, and on military advice. According to his Luftwaffe adjutant, Nicolaus von Below, ‘the English army had no significance for him’ at Dunkirk.65