Chapter 28

all company headquarters of the battalion. e. Verbal messages will not be sent by runners; all messages must be written. f. Company commanders, or their representatives, will report daily at battalion headquarters at 5.00 p.m. g. There must be accurate communication between platoons in company, and companies in battalion, in order to insure co-ordinated action.

7. DEFENSE: a. Immediately after the occupation of the trenches, company commanders will make a careful estimate of all tactical situations presented in their sectors and will plan for a stubborn defense. Care must be exercised in providing for defense in depth and lateral defense. The front line trenches of each sector will be held until actually entered by the enemy, and no sector will be abandoned until the occupants are actually forced out. b. The main line of resistance will be the support trenches (_Tremont_) and special attention must be given to the preparation for defense. If the front line trenches of any sector be captured by the enemy there will be no withdrawal from any other sector of the front line trenches for the purpose of establishing a continuous line in the support trench.