The plan called for units to leapfrog over one another, as the advance progressed, to maintain momentum during the attack. The initial wave would capture and consolidate the Black Line and then push forward to the Red Line. The barrage would pause, to enable reserve units to move up and then move forward with the units pushing beyond the Red Line to the Blue Line. Once the corps secured the Blue Line, advancing units would once again leapfrog established ones and capture the Brown Line. Conducted properly, the plan would leave the German forces little time to exit the security of their deep dugouts and defend their positions against the infantry advance. If the corps maintained its schedule, the troops would advance as much as and have the majority of the ridge under control by 1:00 pm of the first day.