13 June and XXI Corps was to attack from the Lorette Spur towards Bois de Givenchy, XX Corps was to complete the capture of Neuville and the and XXIII Corps was shifted slightly north to attack Souchez, Château Carleul, and Givenchy-en-Gohelle. IX Corps was moved from the northern boundary of the Tenth Army and placed between XXXIII Corps and XX Corps to take Vimy Ridge. During minor attacks in early June, the IX Corps divisions had gained little success and in one attack the infantry went to ground and refused to continue, which if repeated would leave the XXXIII Corps vulnerable to another advance into a salient. The artillery preparation was carefully observed from the front line and IX Corps troops were issued flares to signal to the artillery, who reported a highly accurate bombardment, particularly on the crossroads and a derelict mill, which were the principal German defensive works opposite. On 15 June the commander of the 17th Division on the right of the IX Corps, wrote to General Curé, the corps commander, that preparations were incomplete and had not conformed to Note 5779, leaving the jumping-off trenches from the German front line, rather than the or fewer laid down and that the infantry was already exhausted. In the rest of the Tenth Army the situation was the same, with infantry being set to hours of digging under German counter-bombardments. It was also discovered that the accuracy of French artillery-fire, was not sufficient to make it effective. An attack on 13 June, by a regiment of the 70th Division on the sugar refinery, captured a small length of the German front trench, where they were bombarded by French artillery. An attack on 14 June took another short length of trench but the regiment had to be relieved by part of the 13th Division during the night of Reports from the IX and XX corps on the southern flank, described accurate French artillery fire and XXI Corps on the Lorette Spur had a commanding view of German defences. Maistre the corps commander, had made artillery observation a specialist role for trained men, who kept close to the infantry to ensure efficient liaison. It was soon discovered that the Germans had put barbed wire in front of the front line, rather than just in front and special bombardments were fired to cut the wire, after which patrols went forward to check