Haig selected Gough to command the offensive on 30 April, and on 10 June Gough and the Fifth Army headquarters took over the Ypres salient north of Messines Ridge. Gough planned an offensive based on the "GHQ 1917" plan and the instructions he had received from Haig. Gough held meetings with his corps commanders on 6 and 16 June, where the third objective, which included the (third line), a second-day objective in earlier plans, was added to the two objectives due to be taken on the first day. A fourth objective, the red line was also given for the first day, to be attempted by fresh troops, at the discretion of divisional and corps commanders, in places where the German defence had collapsed. The attack was not planned as a breakthrough operation and , the fourth German defensive position, lay behind the front line and was not an objective on the first day.