_Lieutenant Ralston_: “I would have three squads in the support. I would have them march with a column of files on each side of the road. I would have two squads on this side of the road towards the enemy and one squad on the other side.” _The Director_: “What are the advantages of this formation?” _Lieutenant Ralston_: “It makes easier marching than in a column of squads; the column is not so vulnerable to enemy fire; if a deployment to the front is necessary it may readily be effected by deploying the leading squad of each column to the right and left respectively and deploying the rear squad of the column towards the enemy in rear of them. If a deployment to the flank towards the enemy is necessary it is practically already made for we have two squads on that flank now, and all the men will have to do is get a little more interval, the squad on the side of the road away from the enemy will get their proper interval and are in the right position for a small reserve; and deployments can be made without any confusion in case of sudden attack.” _The Director_: “I think we can all agree that you have the proper formation. Now, I want each member of the class to draw a rough sketch of the road at this point and show on it the detailed formation of the flank guard. Make the scale large so you can show the details.” Procedure When the sketches are completed the Director distributes a mimeographed sketch showing the disposition of the flank guard in order that the members of the class may compare their sketches with it. * * * * * =Flank Guard= =Card No. 1= =Director’s Key= 1. Conduct class to place where the Terrain Exercise is to begin. Distribute the problem. Read and explain. Have members of class explain their understanding of the problem. 2. Explain necessity for employment of a flank guard:—protection of exposed flank; where march; formation; patrols; rear guard; duties. 3. Solution:—formation; advance party and support; covers more road space; dispersion; formation of point; connecting files; distances between elements; communication with main body. 4. Flank patrols:—necessity for; do not use except when necessary. 5. Marching formation of support. Advantages of column of files on each side of the road:—easy marching; invulnerability to enemy fire; deployments facilitated. 6. Have class make sketch; distribute sheets showing solution and compare with sketches made. * * * * * Procedure