 Gough had intended to attack Thiepval with the 49th and 32nd divisions and the 48th Division of VIII Corps; eventually changes of plan reduced the attack to two brigades of the 32nd Division.Just before the attack by X Corps and III Corps began on 3 July, Gough revealed that X Corps could not attack before and at noon, VIII Corps and X Corps were detached from the Fourth Army to Gough and the Reserve Army.Later II Corps, I Anzac Corps and the Canadian Corps were added to the Reserve Army.