Reserve Corps had been moved to the Somme. In his 2012 biography of Haking, Senior wrote that he had only consulted the official history volume 1916 II for his earlier book and had changed his mind after studying German records. Peter Pedersen wrote that the Germans knew that Fromelles was a decoy and sent reserves to the Somme; in the Australian official history Charles Bean wrote that the attack showed the Germans that they were free to withdraw troops. In 2007, Paul Cobb wrote that the Germans were not deterred from sending troops to the Somme. Senior wrote that there was evidence that the transfer of troops to the south was delayed by the attack on Fromelles; a German intelligence officer of the 6th Bavarian Reserve Division wrote on 20 July, A Bavarian document discovered in 1923 contained information that Charles Bean wrote in 1930 that the Bavarians might have been sceptical that the British would sacrifice as a decoy. The IX Reserve Corps and Guard Reserve Corps had been moved from the Souchez–Vimy area, from Fromelles, well outside the sector opposite the British XI Corps. Troops kept in the Loos–Armentières sector, opposite XI Corps, for four weeks after 19 July were held back as a precaution. German records showed that eight divisions were in the line between Loos and Armentières on 1 July and that two were sent to the Somme by 2 July, long before the Fromelles attack; the other six divisions stayed opposite XI Corps for five to nine weeks after 19 July. Had divisions moved earlier, the Battle of Pozières might have cost I Anzac Corps far more than the that it suffered. Senior concluded that because of the Attack at Fromelles, German troops had been retained opposite XI Corps as intended. Casualties The battle caused one of the greatest numbers of Australian deaths in action in 24 hours, surpassed only at the Battle of Bullecourt in 1917. The 5th Australian Division suffered in the 8th Australian Brigade, of the 15th Australian Brigade, in the 14th Australian Brigade and from the divisional engineers. Two battalions had so many casualties that they had to be rebuilt. Of from the 60th Australian Battalion, only one officer and ranks survived unwounded and the 32nd Australian Battalion suffered The 31st Australian Battalion had and the 32nd Australian Battalion lost The 61st (2nd South Midland) Division was understrength before the battle