What do you, Sergeant B, do. Explanation _The Director_: “The commander of a patrol will see the commander of the outguard at the place where he crosses the line of observation and give him information as to where he is going and what he is going for. In addition to this he secures any information that the outguard commander may have of the country to the front and the enemy. “This procedure is especially necessary in the present case. Sergeant B’s mission will probably keep him out late, so that it will be after dark when he comes back through the lines. In order to avoid chances of being mistaken for the enemy a recognition signal should be arranged for at this time.” Solution _The Director_: “Lieutenant Ralston, you are Sergeant B, the patrol leader. The outguard commander has come out to meet you. Just what would you do with respect to your patrol and what would you say to the outguard commander?” _Lieutenant Ralston_: “In the first place I will signal the patrol to halt. I will then tell the outguard commander where we are going and all about the mission of the patrol. I will arrange a recognition signal with him. I will find out any information about the enemy that he may have.” _The Director_: “All right. You have told us all about what you will do. Now let us do it. Assume that I am the outguard commander. Now just what will you say to me?” _Lieutenant Ralston_: “I will say: “‘Information has been received that there is a Red force in the vicinity of (_h_). (Indicating on the map.) We are going out as a reconnoitering patrol, guiding on the ... road. (Indicating on the map.) We are to determine the enemy’s strength, and composition and what he is doing. I have four other men with me. “‘We will probably be out until after dark and I want to arrange a recognition signal with you. If agreeable to you it will be the call 3—4 or the same tapped on the rifle stock. “‘Have you any information about the enemy?’ “After doing all of this I will signal the patrol FORWARD MARCH and proceed on my way.” _The Director_: “That is very good. I wish you would explain to the class just how you propose to employ the recognition signal.”