Sixth Problem and Seventh Problem: Two Pickets: A. Definition and Function.--Outpost contrasted with advance guard in that former is stationed around a camp or bivouac, while latter precedes a marching column. To check enemy attempting to attack main body, and hold him till larger force is able to deploy. Consists of outpost reserve, outpost line of supports, line of outguards (pickets, sentry squads, and cossack posts), plus sentinels, patrols, etc. Picket ordinarily merely warns of an attack, but may offer resistance. B. Principles: 1. Smooth posting of outpost very desirable; influence of delay on spirits of men, after day's march. 2. Outpost support sends out pickets. 3. Picket sends out sentry squads, cossack posts, sentinels, etc. 4. Provisional dispositions by leaders of outguard elements; importance of good sketch; intrenchments? 5. Confirmation and alteration by higher officers; especially changes at night regarding layout and manning. Fire ineffective at night except at short ranges. 6. Roster =? 7. Instructions regarding enemy's position and strength, and the friendly outguards to right and left. 8. Mode of numbering elements (from right to right). Arrangement for smooth withdrawal of each element upon stronger one. 9. Disposition of strangers; use for information. 10. Need of explicit arrangements in case of attack in day or night. 11. Sleep near arms. Eighth Problem--Cossack Post and Sentry Squad: A. Definition and Function: 1. Cossack Post: 4 men in charge of a corporal (usually) primarily to observe and warn; secondarily to keep concealed, and intercept strangers who might be useful to enemy or to us. 2. Sentry Squad: 8 men in charge of a corporal. Duties similar but strength is greater. Posts double sentinel. 3. Post important enough for a cossack post is often doubled into a sentry squad at night. B. Principles: 1. Opportunity to "pick off" enemies ought to be ignored until position of c.p. or s.s. or of its supporting body has unquestionably been learned by enemy. Then fire away. 2. _Stop_ enemy's patrolling. Is as important as to _force_ your own observation. 3. Advantages of s.s. over c.p. for night work: (a) strength, (b) sureness, (c) adequacy of observation before firing alarm. 4. Use of prisoners, and papers on dead bodies. 5. Value of imagining yourself in position of enemy commander in deciding what enemy dispositions you will combat him with. Ninth Problem: Reconnoitering Patrol: A. Definition and Function.--Gather information in the field. No resistance unless compelled. Concealment and flight rather than resistance by fire: opposite of "covering detachment." B. Principles.