D-Day_ The Battle for Normandy - Antony Beevor [97]
All German headquarters in Normandy soon found to their cost that they had to resort to the radio more and more. Bombing and shelling, to say nothing of the Resistance and airborne troops, had severed many of their landlines in the invasion area. This was the bonus which the decrypters at Bletchley Park had been anticipating. The head of the Secret Intelligence Service passed Churchill their first haul.22 They intercepted a report from General Marcks on 8 June stating that the 716th Infanterie-Division had lost at least two-thirds of its strength and that ‘the men show signs of nervous exhaustion’. There was also a warning, but received too late, of the Hitler Jugend attack on the night of 8 June. The next day, General Meindl of II Paratroop Corps complained that ‘most of the land-line links are interrupted. Operations are greatly impeded by the considerable delay in the passing on of orders.’ On 10 June, they intercepted a message saying that ‘by order of commander-in-chief West at 10.30 hours, thorough destruction of Cherbourg harbour to begin forthwith’. They also discovered that fear of another invasion in Brittany had prompted the Luftwaffe to destroy four airfields immediately. The greatest coup, however, came with two messages giving the location of Panzer Group West’s headquarters. To preserve the secret of Ultra, an aircraft was sent over the target area first.
Geyr von Schweppenburg was planning his major attack for dusk on 10 June. Soon after dawn that morning, he climbed the steeple of the Abbaye d’Ardennes on the west side of the city, which Meyer had established as the command post of the 25th SS Panzergrenadier-Regiment. Geyr examined the ground ahead through powerful binoculars. He knew the area well from the late summer of 1940, when he had been training the XXIV Corps ready for the invasion of England. While he was up there he watched British aircraft bomb the panzer regiment of the Hitler Jugend and it confirmed him in his decision that only a night attack was possible.
That afternoon, Rommel came to see him at his command post in the grounds of the Château de La Caine near Thury-Harcourt. Geyr told him his plan, and although both men would have preferred to attack more towards Bayeux, this change would cause too great a delay. Rommel also wanted to know the next step. Geyr quoted the Napoleonic principle of ‘s’engager puis voir’. Rommel agreed and took his leave. Geyr warned him about the danger of Allied fighter-bombers. Yet his own headquarters offered the most tempting target. Just after Rommel’s departure reports came in from the Panzer Lehr Division that about sixty British tanks had broken through from Bretteville-l’Orgueilleuse towards Tilly-sur-Seulles. Geyr claimed that because he had no reserves available, he felt obliged to cancel the night attack near Caen. In fact, a far more pressing reason arose for cancelling the offensive that night.
Rocket-firing RAF Typhoon squadrons came in low, their pilots well briefed on their target. They were then followed by waves of Mitchell medium bombers. Astonishingly, Geyr’s headquarters and its vehicles in the park of the château had not been properly camouflaged. The effect was devastating. His chief of staff died and ‘all personnel of the operations section as well as most