On 10 March, the Fifth Army took Grévillers Trench and Irles in a methodical attack, which overwhelmed the German defence and took Fires could be seen behind Bapaume, with more visible behind the and British military intelligence reported that the headquarters of Rupprecht had been moved to Mons; civilians were known to have been evacuated along with supply dumps and artillery. The was found to be empty between Bapaume and Achiet le Petit on the night of 12 March but next day an attack on Bucquoy failed with The German document found in Loupart Wood dated 5 March, containing details of the (Operation ), showed that Loupart Wood had been abandoned a day early. On the night of 14 March, patrols found that the Germans had withdrawn from part of the Fourth Army front and on 17 March, the Germans slipped away on all of the Third and Fifth Army fronts.