_Captain Hall_: “The first thing would be the time of the attack. The orders from regimental headquarters say 5.00 o’clock. That will be included in the order. We have a definite mission for the battalion. To pierce the enemy position and assist our division to penetrate the position—that is, to make a break through, if possible. In order to do this we have got to drive hard. There is no change in the zone of action of the battalion; it remains the same as it was for today. The line of departure should be given. The information about the artillery preparation and the rolling barrage should be included. I think that is about all that must go into paragraph two of the order.” _The Director_: “Yes. But you have skimped over two very important points without the explanation they deserve. These are the line of departure and the information about the artillery preparation and the rolling barrage. Let us go into these things a little more in detail. “The division staff has made arrangements for the artillery preparation to come down along a certain line, and stand there for a period of thirty minutes. Then the barrage will begin to advance at exactly 5.00 o’clock. Unless we have a definite line of departure some parts of our front line may work their way to the front and be caught under our own barrage and you can see what would happen. In case any men do work forward during the night on reconnaissance they must get back a little before 4.30 so as not to get caught under the barrage.” _Lieutenant Barry_: “I appreciate all the Director has said. But we have to keep up a reconnaissance during the night to keep in contact with the enemy. He might pull his lines back during the night and if he had decided to make a general retreat we would lose touch and with it a lot of time in conducting the pursuit. I think some of our patrols would have to take a chance on getting back so as not to lose contact. Then, too, if the enemy had pretty definite information that our artillery preparation is coming down on a certain line and we have no men out in front he may move his machine gun squads a little to the front and avoid the barrage altogether and be ready to receive our attack when our first wave goes over the top. If I were commanding one of those assault companies I would keep my front thoroughly patrolled during the night and keep my scouts right up in the enemy’s lines until a minute or two before the barrage comes down. I would have them beat it back a hundred yards and take a chance on escaping from the barrage. As soon as they are out of the way I would then have my special weapons and riflemen keep up a fire on any enemy troops that showed themselves trying to get to a position in front of where the barrage is coming down.” Explanation