I'm glad YOU said that! The Brits developed 'fire and movement' (one part of a unit putting down covering fire, the other part moving) after the disaster of the first day of the Somme - 'over the top' - expecting he tremendous artillery barrage to wipe out the opposition. What did Pershing do? "During the three hours preceding H hour, the
Allies expended more ammunition than both sides managed to fire throughout the four years of the American Civil War"( Artillery Capt. Harry S. Truman). then sent the 'over the top'. First Army casualties were over 9000 men lost and over 100,000 men injured since the start of Meuse-Argonne. it was a relatively quiet part of the front and they had advanced 10 miles - half the distance of their French allies. It was hard replacing those losses and developing a transport network to bring in reinforcements.