The 1st and 2nd Divisions were in need of replacements after their engagements at Cantigny and Château-Thierry – Belleau Wood, respectively. Both divisions were brought to full strength with men from the 41st Division in early July. On 12 July, less than six days before the start of the attack, both the 1st and 2nd Divisions were assigned to the newly formed American III Corps which was attached to the French Sixth Army in the same order. Fayolle's Chief of Staff, General , sent a telegram two days later attaching both divisions to Mangin's Tenth Army.